this is usually a bios setting. How do you turn off the computer? If you just turn off the power at the strip, then the computer thinks it has ihad interrupted power and the bios tells it to restart. Change that bios setting. If you do the correct shutdown sequence from windows, then when it powers down it should shut off and stay off until you press the power button.
By the way, if you do shut down the computer by the strip, thats akin to stopping a car by hitting a brick wall. Don't do it!!
sharon
December 2007