To reboot (or restart) your PC, do just as you would to shut it down, except select restart rather than shut down. If your computer has frozen (locked up) and you cannot get it to do anything, hold the power button in for a count of 5. That will shut it down and you can power it back up normally.
or visit blog http://articalsworld.blogspot.com
good info, to bad you weren't around in aug 08, when poster asked the question .lol