In Windows Vista, you configure Microsoft BitLocker Drive Encryption to use a key that is stored on a USB device. Then, you disconnect the USB device when the computer is in hibernation. When the computer resumes from hibernation, you receive an error message that informs you of the following:

The BitLocker Drive Encryption key is needed to resume the computer. You can press ENTER to perform a recovery of the computer. You can manually enter the key, or you can insert the USB device that contains the key, and then press ESC to restart the computer.

After you manually enter the key, or you insert the USB device that contains the key, and you press the ESC key, one of the following problems occurs:

• The computer crashes.
• The computer does not restart.
• The screen flashes or displays garbled characters on the screen.