✔ 最佳答案
Try this in XP:
Right-click an empty space on your desktopIn menu, click New then click Shortcut at top
In first dialog box, type shutdown -s -t 7200
Click Next then type a filename such as 7200 shutdown in the dialog box in the next window
Click Finish and a shortcut will be installed on your desktop.
Now click this icon every time after you log in to the desktop and start your count down. The computer will be shut down after the time your specify in step 3. Have fun.