step1:START>ALL PROGRAMS>Accessories>System Tools>Scheduled Tasks.
step2:file>new>Scheduled Tasks.
step3:Rename to shutdown.
step4:In RUN type "%windir%\System32\shutdown.exe -s -f -t 01".
step5:Start in type "C:\WINDOWS\System32".
step6:SHUTDOWN.
step7:set time in Schedule>Schedule Task.
step8: press OK.