"There are also other reasons for rebooting XP daily, as Microsoft blogger Robert Scoble explains:Correction. He's been using Microsoft operating systems for 20 years. None of the others need to be rebooted daily!
"I shut down my Tablet PC most evenings and start it up from a fresh boot. Why do I do that? Because I've been using computers for 20 years and have learned that's the best way to work."