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HP and Compaq PCs - USB Devices Quit Working Unexpectedly (Windows XP)

A USB device, such as a camera, scanner, or printer, loses its connection and stops working unexpectedly. The USB device works when Windows starts but later stops working.
Disable power management on the USB hub
With some devices, Window XP tries to disable USB when a device is not used. Windows XP does this to save power. This may not work under many circumstances and may cause the USB devices to fail to wake up when called. To fix this problem, use the following steps:
  1. Click Start, and right-click My Computer.
  2. Click Properties, then click Hardware.
  3. Click Device Manager.
  4. Double-click Universal Serial Bus Controllers.
  5. Right-click USB Root Hub, and then click Properties.
  6. Click Power Management.
  7. Unselect Allow the computer to turn off this device to save power.
  8. Repeat Steps 5 through 7 for each USB Root Hub.
  9. Click OK, and close Device Manager.
  note:
If the steps in this document failed to resolve your issue, USB may have failed. If your computer was purchased after 2001, it probably contains a software program called PC Doctor. Use PC Doctor to help verify USB failures before calling support or repairing the computer. Use the HP support document Using PC Doctor to learn more about testing for USB failures. If you receive an error code after running a test, you need to Contact HP (in English) for further assistance. Write the error code number down so that you can provide it to a support agent.
  note:
One or more of the links above will take you outside the Hewlett-Packard Web site. HP does not control and is not responsible for information outside the HP Web site.

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