Question : Vista resumes randomly from Sleep/Hibernate

After I sleep or hibernate in windows vista, the computer will randomly resume/wake up.  It could be several hours after it enters sleep or hibernate, I have no idea what causes it.  The system looks to be completely powered down (there is no power light) in either sleep or hibernate mode.  What could be causing the system to resume?  With XP on the same system I never had this problem.

Answer : Vista resumes randomly from Sleep/Hibernate

did you check in the power section of the bios the "wake on" settings ? - disable them