Create a Password Reset Disk

Password reset disk can really handy if you forgot your user account password (which are not part of a domain). If you are in this situation, you can use a password reset disk to reset passwords and use them back to your user account. In Windows7/Vista, you can use a USB flash drive as a password reset disk.

Improve performance

If using windows 7/Vista, you can use a USB flash drive to speed up the system with ReadyBoost technology which is integrated in the Windows operating system 7/Vista as tweaking tool.
Features ReadyBoost can use storage space on USB flash drive as additional memory cache to help the cache memory on your hard disk. Because flash memory is more responsive than the hard drive which consists of physical parts that move, cache memory provided by ReadyBoost can improve system response significantly. Using ReadyBoost is not difficult, you just need to plug the USB flash drive to the computer and follow the instructions for configuring and using ReadyBoost. Good luck.