Отправь ее спать

Shutdown:

%windir%System32shutdown.exe -s

Reboot:

%windir%System32shutdown.exe -r

Logoff:

%windir%System32shutdown.exe -l

Standby:

%windir%System32rundll32.exe powrprof.dll,SetSuspendState Standby

Hibernate:

%windir%System32rundll32.exe powrprof.dll,SetSuspendState Hibernate