My key USB Lexar is recognized but then disappears

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  Error "USB device not recognized", but nothing is plugged in and my webcam is not working. It says webcam not connected

  Hello

  Since you said it worked very well recently, I'll try to do a system restore at this point in time.

  See this link: http://windows.microsoft.com/en-us/windows7/products/features/system-restore?SignedIn=1

  In addition, see the response of the Meghmala and follow the instructions listed there. I think that the three method might be the best of the bunch for you, but they have all the right steps.

  See this thread: http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/usb-device-not-recognized-in-windows-7/8106a712-a13e-4ca5-b82e-c3961cc254b1

• Can't get my GMail password! Settings > mail > Gmail: press the "re - enter Password' and the window starts to load, but then disappears.

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  SOLVED! I thought about it. As usual, at the point where I have ask for help is when I tell me how to solve. It's simple, really. I was at work, so I guess that the security settings on the wifi of the company prevented me to access these panels (for some odd reason)? I simply turned off the wifi in the settings, and everything works perfectly.

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• Error "USB device not recognized" but nothing is plugged

  Hi, this problem recently just started to happen, nowhere I can say. Whenever I turn on my computer or it wake up from hibernation, a message from the task bar appears saying "USB device not recognized". However, there is nothing plugged one of my USB ports. I have three USB ports available, and all are empty. I tested all three ports in something by plugging, and all three ports seem to work well. What can I do to get this message to stop appearing? Thanks in advance!

  Hello

  Some USB devices are integrated as WebCam, Touchpad, fingerprint and other reader, so it could
  be people or a total glitch.

  ----------------------------------------------------------

  References to Vista also apply to Windows 7.

  Follow these steps to remove corruption and missing/damaged file system repair or replacement.

  Start - type in the search box - find command top - RIGHT CLICK – RUN AS ADMIN

  sfc/scannow

  How to fix the system files of Windows 7 with the System File Checker
  http://www.SevenForums.com/tutorials/1538-SFC-SCANNOW-Command-System-File-Checker.html

  Then run checkdisk (chkdsk).

  How to run check disk in Windows 7
  http://www.SevenForums.com/tutorials/433-disk-check.html

  -----------------------------------------------

  Then lets refresh the USB stack

  Control the click Control Panel - Device Manager - no matter where in the box of white/white - then the VIEW - see the
  Devices disabled - look around (with the exception of USB controllers) for your devices (can have
  zero or more than one) and top - right click UNINSTALL.

  Control Panel right CLICK on EVERYTHING - Serial USB controllers - device configuration-manager and
  UNINSTALL all but the category itself - REBOOT - it refreshes the driver and battery USB

  This KB shows XP how to and methods of Vista and Windows 7 are the same
  http://support.Microsoft.com/kb/310575

  This is a utility to help you, but do 1 above.

  USBDeview is a small utility that lists all USB devices currently connected to your computer.
  as well as all USB devices that you previously used. Run Options and tick three 1
  are there choices to see if any.

  http://www.NirSoft.NET/utils/usb_devices_view.html

  You must remove all instances of the devices and restart.

  ----------------------------------------------

  If necessary try these two:

  Tips for solving problems of USB devices - and a Mr Fixit
  http://windowshelp.Microsoft.com/Windows/en-us/help/c39bd203-f729-47a4-8351-83291e13c8a81033.mspx#EGB

  Hardware devices not detected or not working - Mr. Fixit
  http://support.Microsoft.com/GP/hardware_device_problems

  I hope this helps.

  Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle="" -="" mark="" twain="" said="" it="">

• Satellite M100-P345: USB device is recognized but it doesn't work

  My usb port works with external hard drive but not usb key USB flash drive. This problem occur because I update my XP Home Edition of XP pro SP2 edition. I've updated all the latest patch but the problem stil occur.

  The system can not assigned a player for it. It recognizes the device as a removable disk, but I can't find it in my computer (means I can't access). In System Manager devices, usb disk information such as status: online, the remaining space, total space etc. n can b shown. the only problem is that I can't access.
  I have tried to search for solution in trobleshooting, a part of the path is

  updated 1) day the latest patch
  (2) unsintall usb driver n restart the computer
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  is it possible to solve or someone have faced the same prob in other models?

  [Edited by: admin]

  Hello

  Try contacting the manufacturer of the USB. Visit the support page. Who is the producer of this USB key. I have two of them (various manufacturers) and both of them works on several different laptops.

• Everything started happening: Windows 7 taskbar hidden Firefox down. Reappears if F11 key twice but then disappears again

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  Hello

  My name is Karen, I just got a new monitor used, but when you turn it on, it turns on, but then you can't see something that he disappeared and in the middle of the screen it says u can not display this video mode, your help would be great thanks.

  Hi Karen,.

  Welcome to the Microsoft community. According to the description, you are not able to get the display on the monitor.

  ·         What is the full error message?

  I'll help you with this problem. I suggest you follow the steps in the article.

  Troubleshoot monitor and video card

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• I get message "USB device not recognized", but two USB devices are actually works very well. Poster sometimes Device Manager 'unknown device', then it will disappear and reappear.

  Poster sometimes Device Manager 'unknown device', then it will disappear and reappear with the error message.  Sometimes, I see the message even when there is nothing in the USB port.

  Hi malsnano,

  I see that usb devices do not work on xp. I'll help you with this problem.

  1. What is the brand and model of the computer?

  2. what security software is installed on the computer?

  3. have you made changes on the computer recently?

  4 is the issue limited to these usb devices?

  Method 1:

  Run the fixit from Microsoft Fixit article and if that helps.

  Hardware devices do not work or are not detected in Windows:

  http://support.Microsoft.com/mats/hardware_device_problems/en-us

  M odes 2:

  Put the computer in a clean boot state, then check if that helps.

  How to solve the problem by performing a clean boot state:
  http://support.Microsoft.com/kb/929135

  Note: Once you have completed troubleshooting, perform the steps in step 3: to reset the computer as usual.

  Method 3.

  Run a full scan of the computer with the Microsoft Safety Scanner to make sure that the computer is virus-free.

  Microsoft safety scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx

  Warning of Security Scanner: there could be a loss of data while performing an analysis using the Microsoft safety scanner to eliminate viruses as appropriate.

  Method 4.

  You can disconnect all USB devices and then perform the following steps:

  1. click on start and then click Control Panel.
  2. click on system and Maintenance, click System, and then click Device Manager.
  Note that if control panel is in Classic view, double-click System and then click on Device Manager.
  If you are prompted for an administrator password or a confirmation, type the password, or click on allow.
  3. in Device Manager, double-click to expand the "USB Bus controllers", right click on the controller host, click "Uninstall" and click "OK".
  Check that if at all, there is an exclamation point on the pilot, it suggests problems with the installed driver.
  4. Repeat step 2 to uninstall all items under 'USB Bus controllers'.
  Then, restart the computer and Windows XP will automatically reinstall all USB controllers.

  Let us know if you need assistance with any windows problem. We will be happy to help you.

• Receives the error "USB device not recognized" but nothing is attached to the laptop

  I get "Device not recognized USB" popping up - I have no devices attached to my laptop USB

  Hi jamescrighton,

  Please see the thread with a similar problem and fix possible:

  http://answers.Microsoft.com/en-us/Windows/Forum/windows_vista-hardware/USB-device-is-not-recognised-but-no-devices-are/d50b8f81-478A-4020-8FD0-a44ba44ab440

  I hope this helps!

• When I try to download a file from the internet, it shows that the download is complete but then disappears from the desktop. I can not open or save attachments in e-mail

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  Looks like you've been juggling your win7 settings, you do not disable the firewall or disble MSE, or create a new user account.

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• I have a card reader 4 slot on my pc windows will work recognize it not unless I restart the pc, then it will work several times, but then disappear eny idears?

  When work windows he reconizes as removable disk, s G I J + K

  Hello Ken.53,

  Thank you for your message.  Go to the website of the manufacturer of your computer and download/install the latest drivers for your card reader.  Please let us know if it did or did not help to solve your problem.
  See you soon

  Engineer Jason Microsoft Support answers visit our Microsoft answers feedback Forum and let us know what you think.

• Title of the document appears, then disappears

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• Satellite A500 - 14K - key USB not recognized with Windows 7

  I have a Toshiba Satellite A500 14 K, it was pre-installed for Windows 7.
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  There was no particular error in these facilities.

  Since this upgrade, my PC doesn't recognize USB keys while they work perfectly with the previous version of windows with this pc. They are normally key usb plug-and-play. When I launched the update of windows, the driver exists, but installation failed in error with a message of access problem.
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  I can't find any similar pb on the forum
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  Hello

  Have you tried to update (restore) chipset utility?

  http://EU.computers.Toshiba-Europe.com/innovation/download_drivers_bios.jsp