It seems that many people are still getting the 'USB Device not
Recognized' problem from time to time. Unfortunately there is no easy
fix.
Firstly, it's recommended that you make sure every one of your
motherboard drivers are completely up-to-date, but you probably already
knew that.
In XP, after a USB port isn't used for a long while the USB driver
built into the OS sets the OHCI controller to suspend. When you plug a
device back in, it can sometimes fail to 'wake up' properly. This
problem was supposedly fixed in SP1 but there is a related registry hack
that may still be able to help.
Run regedt32.exe and navigate to;
HKEY_LOCAL_Machine\SYSTEM\CurrentControlSet\Services\Usb
Create the Usb key if it doesn't already exist. Under this key, create a new DWORD value called DisableSelectiveSuspend and give it a value of 1. Then restart the PC.
A long shot perhaps, but I recall having similar problems with a USB
hub built into my Microsoft keyboard and adding this key seemed to
solve it. It wouldn't hurt in trying .
Alternatively, removing all entries relating to USB in Device
Manager and all associated USB drivers will force XP into refreshing the
USB driver stack.
Begin by unplugging all USB devices, then use Add/Remove Programs in
Control Panel to uninstall any USB driver software. Next, boot up into
safe mode and go to Device Manager. Once in device manager make sure
'Show hidden devices' is checked under the View menu. Uninstall all
device entries in this order;
1. USB peripheral devices (printers etc.)
2. HID and/or Composite USB (Human Interface Devices) You're using PS/2 input devices so you may not have this entry.
3. USB Root Hub(s)
4. USB Host Controller(s) (Universal or Enhanced Host Controllers)
Then boot back into Windows (not safe mode) and it should populate
the Root Hubs & Host controllers again. Proceed to plug your USB
devices back in, starting with your powered hub. Be aware that most USB
printers and scanners need to have their drivers installed first before
you plug them in.
Any doubts you can get the help of a technician through
www.thebestpcdoctor.com
Toll free: 877 407 9229
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