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USB drivers

Discussion in 'Hardware' started by Nick Toeman, Feb 8, 2007.

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  1. Nick Toeman

    Nick Toeman Thread Starter

    Joined:
    Jul 10, 2003
    Messages:
    164
    My USB ports have suddenly stopped working fully. Previously working devices continue to work correctly but I cannot connect new ones. When I try, Windows recognises the new hardware and launches a wizard to find a driver but then fails to find it either locally or on the Internet. Subsequently the device is ignored when plugged in. The devices all work correctly on my other (laptop) PC.

    The system with problems is a Mesh desktop PC running WinXP Home SP2 with automatic updates enabled. My old Olympus digital camera, HP printer and 256MB flash drive still work fine, however my new Panasonic digital camera, 2GB flash drive and LG mobile phone do not work on the Mesh but are fine on my Toshiba laptop.

    I am aware of one event that might be significant. I have a cheap webcam that used to work on the desktop but I unplugged it to use with my laptop. That was fine except that it will not now connect to either PC. This was the first instance I noticed of a USB driver not being found (although I hadn’t uninstalled the webcam) but it doesn’t appear to have affected the laptop in any other way.

    I have tried unplugging all USB devices and un-installing all USB drivers. On re-booting, XP finds the 3 USB controllers (I have 3 pairs of physical USB ports) but cannot find the driver software. I have done a System Restore to get back to where I was before. There are no question marks in Drivers under USB devices and under Devices I have deleted the USB camera and USB drive which did display yellow question marks.

    My motherboard is not listed on the manufacturer’s site (presumably because it is a “special” manufactured for Mesh) so I can’t search for updates.

    Any ideas on what is wrong and what else I could try?
     
  2. bigbear

    bigbear

    Joined:
    Apr 27, 2004
    Messages:
    4,719
    Try this fix by JohnWill

    Create a file with NOTEPAD containing the following lines and save it as FIX.REG
    -------------------------- Use text after this line --------------------------------
    REGEDIT4

    [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.
    __________________
     
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