You may experience one or more of the following problems after you resume a Windows Vista-based computer from sleep or from hibernation:

• A device stops responding (hangs) or no longer works correctly. There may be a yellow exclamation mark next to the device in Device Manager. Or, the device may not appear in Device Manager. The device may be a fingerprint reader, a Windows Media Center remote control, an optical drive, a FeliCa reader, or some other device.
• After you resume the computer, you use the Safely Remove Hardware option to remove a device on a portable Windows Vista-based computer. However, in this situation, you cannot reconnect the device. After this problem occurs, the computer may stop responding when you try to shut it down or to perform a restart.
• A device such as a fingerprint reader is not available for use at the Welcome screen.
• The LED lights that represent NUM LOCK, CAPS LOCK, and SCROLL LOCK functionality on a universal serial bus (USB) keyboard do not assume their pre-sleep or pre-hibernation status after the computer resumes. Additionally, these lights now remain off, regardless of the status of the corresponding keys.
• You receive an error message that states that a device does not meet the Logo requirements.
• When you connect a USB device, you receive a “Stop 0×7e” error message that resembles the following:
  

  STOP 0×1000007E
  usbhub.sys
  SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

  This problem occurs because of a race condition in the Usbhub.sys driver. This condition occurs if a USB device driver tries to enter a selective suspend state when a previously canceled selective suspend request has not yet been fully processed.

• You receive a Stop error message that resembles the following:
  

  STOP 127
  PAGE_NOT_ZERO_NVIDIA_USB

  This error occurs on a Windows Vista-based computer that uses 2 gigabytes (GB) or more of RAM and an nVidia nForce EHCI controller.

There is a download that resolves this issue. See Hotfixes for details.

32-bit Download: Windows6.0-KB929637-v2-x86.msu

64-Bit Download: Windows6.0-KB929637-v2-x64.msu

This issue is resolved in SP1.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB929734.

Microsoft has a way to automatically fix this problem, click the "Fix It" image to go to the Knowledge Base page that contains the download.