Windows Server 2003 provides an easy way to find when since your server last booted up and how long it has been running.
Navigate to Start -> Run. In the prompt, type ‘CMD’, and click OK. This will open a DOS Prompt window.
Once the DOS prompt is open, type in, ‘net statistics server’, and press enter.
You should now be given a comprehensive set of statistics for your server, the first of which will be the date and time the server last booted into Windows.