After you resume a Windows Vista-based computer from sleep or from hibernation, or after you restart the computer, some devices may no longer work correctly. For example, you may experience any of the following symptoms:

• A device, such as a USB IR receiver, does not resume correctly. When this problem occurs, an associated device, such as the Windows Media Center IR remote control, is unavailable.
• Windows Vista does not detect some USB devices. The USB devices do not work.
• A USB device, such as a fingerprint reader, is not immediately available. For example, it may take 30 seconds for a device to become available after the Welcome screen appears.