When working with some flash drives, a message appears stating that the USB device is not recognized, and it becomes absolutely impossible to work with it. There are several very effective ways to solve this problem, and we will cover all of them.
And if then nothing helps, then it is better to discard the removable media or check the USB port. Let's get started!
Method number 1. Reinstalling controllers
In Windows 10 and earlier versions of this operating system, it is possible to simply remove and reinstall the various devices that are connected to the computer. These include the controllers responsible for the operation of removable drives.
To remove them you need to do the following:
- Search in the Start menu to find a tool called Device Manager. Open it up.
- There expand the section "USB Controllers".
- Click on the first one with the right mouse button and in the drop-down list, click the "Delete" option. Do the same with all other controllers.
- Reboot your computer. Once enabled, it will automatically check which controllers are connected and update their list in the Manager. Along with this, their configuration will also be updated. After that, you can try to insert the USB flash drive again.
If nothing has changed, go to the second method.
Method number 2. Updating Drivers
In some cases, updating the programs necessary for the operation of USB devices also helps. To perform this operation, do the following:
- Open Device Manager again.
- There, notice if there are devices somewhere near which there is a small yellow icon with an exclamation mark. Also try to find "Unknown Device" there. If there are none, open the "Portable Devices" section (these are the flash drives).
- Right-click on the unknown device, the device with the yellow icon and the portable device and click on the item "Update drivers ..." in the drop-down menu.
- In the next window, select "Automatic search ...". Thanks to this, the system will independently find the most suitable drivers on Microsoft servers or its other sources and install them.
- Follow the instructions and wait for the update.
Method number 3. Device power management
In many cases, setting such a simple parameter as power supply also helps. Step by step, this process looks like this:
- In the already familiar Device Manager, right-click on "Unknown device", a device with a yellow icon, or a portable device connected to a computer.
- Select "Properties".
- In the window that opens, go to the "Power Management" tab.
- If there is a checkmark on the item "Allow the disconnection of this device ...", uncheck it. And if it is not, put it on the contrary. Click "OK" and close all windows.
- Try reinserting the drive into your computer and using it. If it doesn't work, restart your computer and do the same.
Also, in some cases, turning off the power supply in the manner described above for a few minutes (5 or 10, no more) helps. After that, you need to return the original hardware configuration.
Method number 4. Troubleshooter
Microsoft has its own utility that is built to find and fix all sorts of errors related to the operation of anything that works over USB. It's called Fix It.
In Windows 10, it is built into the system initially, and in earlier versions, you need to go to the official Microsoft website and click on the "Download" button. Then you will be provided with the most suitable utility.
After launching the downloaded file, it remains to click on the option "Identify problems and install fixes ...". Then the program will automatically find everything that could cause such a problem and fix it. You will only need to observe what is happening and follow the instructions.
What else can you do
Finally, if none of the above works, you can do the following:
- Just remove and reinsert the USB stick. Oftentimes, a simple solution like this can help solve a complex problem.
- Paste it into a different port. If that works, it's best to replace the broken port.
- Connect it to another computer.
- Disconnect all of all USB ports on the computer and insert only the USB flash drive, and try to do this in different ports.
If you have any questions, write them in the comments below.
Symptoms
first Generic Volume,
then what-is-it-is-called-USB device,
then USB mass storage device,
then USB Root Hub,
Text / html 05/05/2009 13:58:42 hpaler 0
this article is taken from "YROMAN"
USB device problems, diagnostics and solutions.
The branch is devoted to problems with flash drives from the very beginning - identification, data recovery, recovery. But the tips given here are generally related to USB devices and data carriers.
In the title I will try to track interesting solutions and summarize the information.
Asking the questioners - first read, think and try the solutions given BEFORE asking the question.So ... there is a lot of details in the posts below, but I'll try to summarize, and the total applies to almost all USB devices (let's omit the exotic about incorrectly connected USB panels to the mother's expenses right away):
1. Data recovery
with a reference flash, with modern operating systems is not a question. They are recognized by the software and processed by hard drives, so we'll forget that, okay ???2. Software that can unlock flash drives, formatting them and other
and the rest is somewhat individual, strongly dependent on the controller in the flash drive, and we will face the search problem a little later.3. Much can be solved
via DOS commands ... and drivers. Linux expert advice is welcome. It is easy to find DOS paths ... in any search engine type USB-DOS ... and you will find4. Quite often
flash drives locked under XP are normally formatted under 98, and then live normally in other systems. For quiet work with most of the different types of devices in 98, you can use the link:
http://lemnews.com/drivers/
there are working natives ...5. Unnatural addition
at the moment - ifa is confirmed that, for example, 98 drafts are made using a single technology ... is there a native? And how to make the device see itself without the native or in case of uncertainty for her? Simple - using USBView, read the vID-pID of the device ... and in the info file of the drive from another normally working device, correct the desired one for the required And this applies not only to flash drives, but to everything growing under USB.6. The flash drive is seen on one computer, and does not work on the other.
A problem that pops up quite often. To partially solve the problem, I recommend going to:
http://www.krn.ru/support/FAQ/Last_C...B_in_WinXP.htm
I think it will ride under 2k with minor changes ...7. Is the device working?
You connect the device .. and it goes into confusion ... either it is not seen, or asks for dravok ..... What to do? It's simple - we try to use USBView and read the info here:
http://www.krn.ru/support/UDsearch.htm
perhaps the device is simply not understood by the system normally. Solution options - find the correct dravok, look up the top, find the software you need ..... everything is in the link ...
For work, I can throw a link on the ID file:
http://www.linux-usb.org/usb.ids
And one more thing ... when working with USBView, I recommend that you check the Config Deskriptors checkbox in Options so that the prog will give out more information on the connection ... it will help! And do not be lazy to press the refresh with the handles ... and look for a fresher version of the firmware, if any!
The advice of Linux specialists and their data are welcome!
If the device is not detected by this method from a poke-spread too ... that's all, read below ... and there, according to the results, either a wooden pinjack and a funeral in a trash can, or to craftsmen to solder the controller, and along the way there are planar inductances , chains of transformation and so on ... it all depends on the decency of the specialist and your facade of the muzzle ...
To me, for example, my BUS makes current for the cost price .... well, sometimes we kick but about a good solution to this or that problem ... but this does not apply to the top !!!8. You don't have to read it .. ..
But problems were noticed under XP and 2K with intermediate hubs-card readers. The flash drive suddenly breaks off .. only reconnect restores the connection. I see a problem in one-interpretation of codes-data streams between the hub on the mother and the intermediate host ...
And also due to lack of nutrition ... such hosts often feed from the mother herself ... which is not good! As an example, screws living through unstable power adapters can suddenly be cut off or jammed out of fear due to a power surge .... tested in practice. This can also apply to USB devices. Think for yourself, decide for yourself ...Clarifications towards the end of paragraph 8
Just in case, I will allow myself one more lyrical digression.
Well, this is so, for the sake of greater beauty, although it is greatly exaggerated, but I think it is accessible.
It must be remembered that in addition to the main power supply circuits of the motherboard, there is also a very necessary reference + 5VSB.
According to the fundamentals of power and mother engineering standards, it provides standby currents in the mother's standby mode, a ready-to-start signal, start-up itself and feeding the periphery that can start the computer, such as:
-mouse-claudia
- network girls-modems-like hardware with WOL \ WOR functions to wake up mom
-memory in STR mode
-quartz on mom (clocks, timers, etc.)
-saving data in CMOS
-USB-peripherals in standby-disconnect computer
-well, and the little things ...
So, if we follow the canons, then we have a low-current constant reference in the form of this branch of power.
And according to the same canons, after starting at a certain moment, the automatics MUST switch the power supply of the periphery and other to the main +5 volts. In this case, measurements will show that after a certain dip, further the + 5VSB branch will be exactly 5 volts with minimal fluctuations.
We also remember that when the current threshold for this interface of 750 milliamperes is reached, the automation MUST also briefly turn off the interface and not turn it back on until the consumption currents fall ... otherwise kerdyk.
But ... alas, now mothers blurt out who are in a lot, so you should not look for a standard.
And now you can think for a minute what happens if the automation does not switch power to the main source at startup. The currents may be enough for the main work, but connecting each new consumer to this power circuit will squander it ... and depending on the solution of the circuits, either the next consumer will not receive sufficient power, and as a result, it is simply not recognized ... or a jump and how option BSOD or even shutdown mother.
It is very easy to observe the power supply references if you have a head and an oscilloscope (well, a normal probe is also good), or programs like Sensor. And the dances of this reference may indicate that either the sensor on the mother is dying, and this is very unpleasant, or we have a problem in nutrition.
A partial solution to the problem lies in reading phages to mothers. Quite often there was such an option - some ports with jumpers on the mother can receive power not only from the duty room power bus (+ 5VSB), but also from the main power circuit, which receives current after starting the computer. This is done by setting jumpers (we are looking in the descriptor). Sometimes, but very rarely, such switches are present in the BIOS-CMOS settings.Http://www.rdm.kiev.ua/flashutil.php utilities for usb
The appearance of the error message "USB device not recognized" when connecting a USB flash drive, printer, keyboard or any other equipment via the USB interface may be due to the influence of a number of factors. Therefore, it is impossible to offer any one solution to the problem; you may have to try all the methods presented below.
Equipment diagnostics
The first step is to make sure that the USB device you are connecting is working properly. Try connecting the equipment to another computer (if possible).
If the error appears on all machines, then you need to look for the cause of the problem in the device itself, the computer has nothing to do with it.
Ports can also be broken. If the equipment is detected on another computer or when connected to a different USB connector, then you should. If you don't have a second computer, you can try the following troubleshooting method:
- Remove the USB device from the port.
- De-energize the computer by turning it off and unplugging the power plug. Press the power key on the system unit and hold it for 10 seconds to reset the residual voltage.
- Turn on your computer and try connecting your hardware again.
Do not forget also about the elementary rules for working with devices connected via the USB interface.
Devices should be connected to the ports on the rear panel of the system unit, directly to the motherboard (this does not apply to laptops, they have all ports on the motherboard).
In addition, if you are using a splitter to which many devices are connected, then disconnect the unnecessary devices.
Driver Verification
If the hardware is working properly, then the problem is probably a software error, which can be resolved through the device manager. To open the manager, press the Win + R keyboard shortcut and enter "devmgmt.msc".
Unidentified hardware should be found in the USB Controllers and Other Devices sections. If the connected device is marked as "Unknown Device", right-click on it and select "Update Drivers". It is important that there is an Internet connection: the system will independently search for suitable drivers.
If the connected device is located in the "Controllers" section, and next to it you see an exclamation mark, then there are two ways to fix the problem. The first is to update the configuration:
The second method is to prohibit turning off the device to save energy:
If the drivers are not installed in automatic mode, you can reinstall them manually:
The list displays a compatible driver that is already installed. Select it and continue adding. After this kind of reinstallation, the problem with the definition of equipment will be resolved. If it does not help, download the device driver on the manufacturer's website (applies to printers, some keyboards) and add them to the system manually. The order is the same, only you do not need to choose from the installed ones, but specify the path to the downloaded driver.
Changing Power Options
On laptops running Windows 8.1 and Windows 10, the "USB device not recognized" error often occurs when connecting external drives and a USB flash drive using USB 3.0. This problem is solved by changing the power supply parameters:
After a reboot, the problem with detecting USB devices on a laptop usually disappears. If we are talking about a USB flash drive, then using special software for recovering removable media sometimes helps:
If, when you connect a USB flash drive, external hard drive, printer or other device connected via USB in Windows 8.1 or Windows 8.1 (I think it applies to Windows 10 as well), you see an error stating that the USB device is not recognized, this instruction should help solve the problem. The error can occur with USB 3.0 and USB 2.0 devices.
The reasons why Windows does not recognize the USB device can be different (there are really many of them), and therefore there are several solutions to the problem, while some will work for one user, others - for another. I will try not to miss anything.
First steps when the error "USB device not recognized" appears
First of all, if you have the indicated when connecting a flash drive, mouse and keyboard or something else, I recommend making sure that it is not the fault of the USB device itself (this, at least, will save you time).
To do this, just try, if possible, connect this device to another computer or laptop and check if it works there. If not, there is every reason to believe that the reason is in the device itself and the methods below will probably not work. It remains only to check the correctness of the connection (if wires are used), connect not to the front, but to the rear USB port, and if all else fails, you need to diagnose the device itself.
The second method that you should try, especially if the same device worked normally before (and also if the first option cannot be implemented, since there is no second computer):
- Disconnect the USB device that is not recognized and turn off the computer. Unplug the plug, then press and hold the power button on the computer for a few seconds - this will remove the remaining charges from the motherboard and accessories.
- Turn on your computer and reconnect the problem device again after Windows boots. There is a chance it will work.
The third point, which can also help faster than all that will be described below: if a lot of equipment is connected to your computer (especially to the front of the PC or through a USB hub), try disconnecting the part of it that is not needed right now, but the device itself causing the error, if possible, connect to the back of the computer (unless it is a laptop). If it worked, you don't need to read further.
Optional: If the USB device has an external power supply, plug it in (or check the connection), and if possible, check if this power supply is working.
USB Device Manager and Driver
In this part, we will talk about how to fix the error USB device is not recognized in the device manager of Windows 7 or Windows 8. I note that these are several methods at once and, as I wrote above, they may or may not work specifically for your situation. ...
So, first of all go to Device Manager. One quick way to do this is to press Windows (with logo) + R, enter devmgmt.msc and press Enter.
Your unidentified device will most likely be located in the following sections of the manager:
- USB controllers
- Other devices (and called "Unknown device")
If this is an unknown device in other devices, then you can, by connecting to the Internet, right-click on it and select "Update drivers" and, perhaps, the operating system will install everything that is needed. If not, then the article How to install an unknown device driver will help you.
In the event that an unknown USB device with an exclamation mark appears in the USB Controllers list, try the following two things:
- Right-click on the device, select Properties, then on the Driver tab, click Roll Back if available, and if not, click Uninstall to uninstall the driver. After that, in the device manager, click "Action" - "Update hardware configuration" and see if your USB device has ceased to be unrecognized.
- Try to go to the properties of all devices named Generic USB Hub, USB Root Hub or USB Root Controller and on the Power Management tab uncheck the box “Allow this device to be turned off to save power”.
Another way, the performance of which happened to be seen in Windows 8.1 (when the system writes in the description of the problem USB device is not recognized): for all the devices listed in the previous paragraph, try the following in order: right-click - "Update drivers". Then - search for drivers on this computer - select the driver from the list of already installed drivers. In the list, you will see a compatible driver (which is already installed). Select it and click "Next" - after reinstalling the driver for the USB controller to which the unidentified device is connected, it can work.
Call or directly on the site! Our experts will be happy to help you!
Mobile phones, gadgets and all sorts of other external devices are almost always connected to a computer using a USB port. In some cases, the computer cannot recognize the connected device and displays a corresponding message. As practice shows, the "USB device not recognized" error can be caused by both hardware faults and software flaws.
What should I do if an error “USB device not recognized” appears?
There is a sequence of actions that will help solve the problem 90% of the time. So, what to do if an error about an unrecognized device appears after connecting to a PC?
- The first step is to try connecting your device to another computer. If the problem persists, you need to change the cable - if the wires in the cable are broken, the error will occur everywhere. If the problem persists after changing the PC and cable, the connected device itself may require repair or replacement.
- The problem might be with a specific USB port. You need to try to connect to other ports located not only next to the inoperative one, but also on the back of the system unit (on the side or behind the laptop).
- Sometimes the problem is caused by static electricity, which prevents the computer from processing signals correctly. Static electricity is a great tool for collecting dust that collects in USB connectors and inside your computer. You should turn off the PC and completely disconnect it from the power system for a few minutes, and at the same time blow out dust from the connectors.
- The recognition error often appears due to a driver malfunction. To fix the error, you need to find the file INFCACHE.1 and remove it. This file contains USB device driver data and erroneous information may cause recognition problem. Administrator rights are required to delete a system file.
How do I find and delete the INFCACHE.1 file?
To do this, you should:
- Go to the C: Windows folder.
- In the menu item "Tools" find the section "Folder Options".
- In the "View" tab, find the "Advanced options" section.
- In the section you need to: uncheck the box next to the item "Hide protected files".
- Check the boxes next to "Show contents of system folders" and "Show hidden files and folders".
- Go to section C: Windowsinf (if using Windows XP) or C: WindowsSystem32DriverStore (if using Windows 7 and later).
- In the section you need to find the INFCACHE.1 file, press the right button and select "Delete".
It should be understood that after these actions, the device will not be recognized immediately. Lack of information about the drivers will prevent the system from finding them, so drivers will have to be installed again... After that, you need to reconnect the device - most likely, the computer recognizes it normally. Of the minuses - when connecting other devices, you may also need to install drivers, even if they worked normally before (the drivers were installed).
Error with USB controller driver
Somewhat less common error caused by corrupted USB controller drivers located in the computer system unit. Fortunately, in most cases, the system itself reinstalls the necessary software if it is damaged or removed. Therefore, to fix the error in recognizing your device, it is enough to remove the controller driver.
- You need to open the Control Panel, find and expand the "Administrative Tools" section.
- In the section that opens, you need to double-click on the item "Computer Management", then double-click to open the "Device Manager".
- In the window that opens, you need to find the line "Universal Serial Bus Controllers" and click on the plus sign on the left.
- After clicking on "+", a list of devices known to your computer will open. Each of them must be right-clicked and select "delete" from the menu that appears.
- After restarting, the computer will not be able to find the required drivers and will install them on its own. If for some reason the automatic installation of the software did not occur, you will need to download and install it manually.
Other causes of the error
If the main ways to solve problems with the software did not help, you should check operability of the USB controller itself... As a guarantee, you can purchase so-called USB hubs that are connected to the PCI slots of your computer. The problem is that without experience and skills, doing it yourself is problematic, and the computer will most likely need to be carried for repair.
If several or all ports of the computer are simultaneously activated at once, then all of them may simply not have enough power. This problem is often observed on older computers and weak laptops with small power supplies. When there is a lack of power, the computer does not have the ability to support the operation of all devices at once and disables one or more of them. An error “USB not recognized” appears on the screen.
System message in case of insufficient power supply can occur immediately after a new USB connection, since the computer initially does not have enough power to fully power and detect the connected device.
The solution to this problem is the simplest: just disconnect something from the computer and free up some energy in the power supply. The residual power should be sufficient to power the new connection.
Text / html 05/05/2009 13:52:48 hpaler 0
article taken from "Yromam"
If you have not installed Windows Hotfix Q810400 " and Windows Hotfix KB822603- then immediately install ( http://windowsupdate.microsoft.com/) and, I hope, you will not need to read further.
The device itself WORKS. You checked it on another machine .
When connected to your computer, it is either not detected at all, or it is detected incorrectly, or even correctly detected, but does not work as it should.
You are sure that all the necessary drivers for all devices connected to the system are installed.
You are sure that the reinstallation and update of the USB controller and USB device drivers is done correctly.
In the "Device manager" - shows that all devices are working normally and there are no conflicts.
The device still does not work, nothing helps, and you are ready to reinstall the system.
Reason.
As a rule, this situation can occur if the USB 2.0 Enhanced Host Controller uses one interrupt together with some other device (IRQ Sharing), for example, audio or video. In this case, the correct transfer of parameters (FDO, PDO) from the drivers is violated. USB (usbhub.sys, usbstor.sys, usbport.sys) to logical device drivers, for example from usbstor.sys to disk.sys in case "USB 2.0 mass storage device".
Possible solutions.
REQUIRED DISCLAIMER:
ALL further actions you take at your own peril and risk, and neither I, nor our company, nor any third party does not bear any responsibility for the consequences of your actions... If you do not at all understand the meaning of the actions described below, it is better not to give it to you. In any case, save everything you can, make a backup, create a restore point, etc.
Further written on the basis of the answer " Microsoft Windows Support Professional "to Mr. rosest, which he posted on the conference site http://www.experts-exchange.com/Hardware/Q_20790258.html with permission from MS support. Although it mentions a digital camera, this applies to all USB mass storage devices. (cameras, card readers, USB HDD, etc.).
Step 1: Disconnect all USB devices from the computer and boot the computer in Safe Mode - press F8 when starting the computer.
If you use a USB mouse and / or keyboard, you do not need to disconnect them, but if you remove either the USB controller, or the hub, or themselves, they will not work. So it is better to boot with a keyboard and mouse not USB.
Step 2: Remove hidden devices
1. Click START. Click Run. Type cmd and click OK.
2. Type "set DEVMGR_SHOW_DETAILS = 1" (without quotes) and press Enter.
3. Print "set DEVMGR_SHOW_NONPRESENT_DEVICES = 1" ( without quotes) and press Enter.
4. Type "start devmgmt.msc" (without quotes) and press Enter r.
"Device Manager" should appear, or "Device Management" in the Russian version.
5. Click View. Click Show hidden devices.
6. Clicking "+" expand Imaging devices, Unknown devices, USB devices, Disk Drives, Storage Volumes, DVD / CD-ROM and other classes that may be related to your non-working device.
For example, USB 2.0 HDD includes classes Disk Drives, Storage Volumes, USB Devices
7. If you see your device (including gray ones) in the deployed classes, right-click on it and click Uninstall in the drop-down menu.
For example, for USB 2.0 HDD, you need to delete all "USB 2.0 Storage Device USB Device" from the class " Disk Drives ", all " USB mass StorageDevice " from class "USB controllers" and gray "Generic Volume" from the "Storage Volumes" class.
Be careful not to remove the devices that maintain your hard drives from which Windows boots.
Step 3: Deleting all oem * .inf files
1.
Click START. Click Run. Print cmd and click OK.
A command prompt window should appear.
2. At the command line, type the following ( without quotes ) and press Enter after each command:
"cd \ windows \ inf"
"ren infcache.1 * .old"
"ren oem * .inf * .old"
"del C: \ windows \ setupapi.log"
"exit"
You can do the same using some shell "a, but you need to enable the ability to view hidden and system files (the inf directory is hidden).
NB! If you have multiple copies of Windows installed, you must follow this procedure FOR ALL Windows installations.
Step 4: Delete all keys in the HKEY_LOCAL_MACHINE / Enum / USB registry key that start with VID
Deleting VID _.... keys from the registry will cause USB devices to be recognized again when the system is restarted.
A WARNING: If you have a USB mouse or keyboard, do not delete their registry branches, otherwise Windows may glitch upon restart.
You can define these branches by clicking on the "+" VID _.... key and click on the key one step below. If on the right in the value of the DeviceDesc variable you see something like "Human Interface Device" or HID - then this is just a mouse or keyboard.
1. Click START. Click Run. Type regedit and click OK.
The Registry Editor should open.
2. Go to HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Enum \ USB.
3. Select and delete all (except HID) VID _.... keys.
Does not work?! Right! First, the permissions on the corresponding key must be set VID _.... registry. For this:
right-click on the appropriate key to open the menu and select Permissions.
choose Everyone and assign Full Control.
Click Apply, then OK.
4. Close everything and turn OFF the computer.
Step 5: Connect your device to your computer:
While the computer is OFF, connect your device to the USB port.
We turn on the computer.
AFTER Windows is COMPLETELY loaded and stops rustling madly hard, connect the power to your device.
The process of detecting a new device and a complete reinstallation of drivers for it should begin.
PS: If after item 2 the execution of item 3 does not occur - I warned you.
Notes (edit)
The above procedure can also be applied to root_hub branches, but only if you do not have a USB keyboard and mouse.
The USBSTORE branch can also be deleted in step 4.
Finally, you can try to completely remove the USB subsystem and force Windows to re-recognize and install all USB drivers. In this case, you need to remove all USB devices in step 2 in the order they appear when viewed in Device manager when browsing devices by connection. For example for USB Flash:
In the registry, also, accordingly, completely delete the keys HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Enum \ USB and HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Enum \ USBSTORE.
