Why do I receive Stop Error 0x0000007E in Windows XP when I add a new USB device?

A. If the USB bandwidth consumption exceeds the 100-percent maximum that the USB 2.0 update or XP Service Pack 1 (SP1) allow, you'll receive the error you mention. Specifically, if existing USB devices are already using the maximum bandwidth and you add another USB device (e.g., if you're viewing streamed audio or video through a USB device and plug in another USB device), you'll receive the following error message:

STOP: 0x0000007E (0xC0000005, <address>, <address>, <address>) 

To work around this problem, you can take one of the following actions:

  • Connect your keyboard, mouse, or other USB device before you start streaming USB video or audio.
  • If you've already started streaming USB video or audio, either stop or pause the stream, connect the keyboard, mouse, or other USB device, and then start the stream again.
  • If your computer has multiple USB host controllers, connect the keyboard, mouse, or other USB device to a USB host controller separate from the USB host controller that you're using to connect the USB video or audio device. Most computers sold in the past year have two or more USB host controllers. To verify this configuration, view the USB host controllers in Device Manager (go to Start, Settings, Control Panel, System, Hardware, and click Device Manager).
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