Echo Off
CLS
REM Time Format: 12:59:59.9
Set HH=%TIME:~0,2%
Set MM=%TIME:~3,2%
Set SS=%TIME:~6,2%
Rem Current Time Is HH:MM:SS
Set /A MM=%MM% * 60
Set /A HH=%HH% * 3600
Set /A Start=%HH% + %MM% + %SS%
Rem Start Is Current Time In Seconds
Set /A End=25200
Set /A TotalTime=%End% - %Start%
Rem Turn Off System At 07:00:00.0
c:\windows\system32\shutdown -s -t %TotalTime% -f
Exit