Using standard commands, I have scripted WhenStarted.bat to return the date and time that your computer was last started.

The syntax for using WhenStarted.bat is:

WhenStarted Date Time

Where:

DATE is a call directed environment variable that will contain the date your computer was started,                                   using your short date format.                              Time is a call directed environment variable that will contain the time your computer was started.
WhenStarted.bat contains:
                              @echo off                              if \{%2\}==\{\} @echo WhenStarted Date Time&goto :EOF                              for /f "Tokens=3,4" %%a in ('net statistics server^|Find "Statistics since"') do (                               set %1=%%a                               set %2=%%b                              )