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usb posters not recognized

Discussion in 'Windows XP' started by daveslides, Jan 22, 2007.

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  1. daveslides

    daveslides Thread Starter

    Jan 22, 2007
    hello and thanks for the help in advance.
    my usb ports were working fine. all flash drives were working fine. then i plugged in a camera card to download pictures. after doing this the flash disks come up unrecognizable. i did the trouble shoot screens with no luck. a usb mouse works fine. so i don't think it is the ports themselves. a tech support for microcenter told me (for $50.00!!) to delete the ports in the control panel software and then to restart the computer. this reassigned them and the usb mouse still works but not the flash drives.

    we have a few large format printers (HP) drivers installed which took forever to got set correctly and we do not want to lose them by reinstalling windows and wiping out the drive.

    can anyone think of a less severe solution?????
    [email protected]
  2. bbearren


    Jul 14, 2006
    Do the flash drives work in another computer?

    There is the possibility that the camera memory card has somehow changed the default type for flash drives, and the O/S is looking for camera cards instead of seeing flash drives.

    Do the flash drives show up in device manager when they are plugged into the USB port?
  3. daveslides

    daveslides Thread Starter

    Jan 22, 2007
    thanks bbearren:
    the flash drives do work in all the other computers.
    the flash drives do show up in device manager as "unknown devices".
    any ideas????????????
    stumped dave
  4. JohnWill

    JohnWill Retired Moderator

    Oct 19, 2002
    First step, Start, Programs, Accessories, System Tools, System Restore. Create a restore point and name it something like "Before USB Fix". This is to bail you out if something goes wrong during the following process and makes things worse.

    Create a file with NOTEPAD containing the following lines and save it as FIX.REG

    -------------------------- Use text after this line --------------------------------
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment]"DEVMGR_SHOW_NONPRESENT_DEVICES"="1"

    -------------------------- Use text before this line --------------------------------

    Double click on FIX.REG and say yes to the Merge Into Registry question.

    Unplug ALL USB devices.
    Open Device Manager.
    View, Show Hidden Devices.
    Uninstall all devices under USB Controllers.
    Uninstall all devices under Disk Drives that you know are not present.
    Uninstall all devices under Storage Volumes. Say no to any reboot prompts until you are finished. Also, if a Storage Volume doesn't uninstall, ignore it and move to the next one.
    If you have a yellow ? with unknown devices, uninstall all of the entries there as well.

    When this is done, reboot TWICE.

    Reconnect the USB devices and see if they're recognized properly.

    NOTE: If you have a USB keyboard and/or mouse, you'll have to modify the instructions and leave enough parts for those to function. I don't have one yet, so I haven't had time to modify the instructions.
  5. daveslides

    daveslides Thread Starter

    Jan 22, 2007
    sorry that did not work????????????????????????????????????????????????????????
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