How to find a Windows Machine system-up time?

Now that I have a desktop at work, I keep it running for long periods of time without shutting it down or restarting. And clearly, since I have a memory that can forget things I did 5 seconds ago (car wiper incident!!), I had to check online to find out a way to check how long back, I had restarted my machine. I found this simple command to give system details - on the command prompt type 'systeminfo' and it will spit out a lot of info - among them will be the 'system-up' time - http://www.techbuzz.in/how-to-find-a-windows-machines-system-up-time.php

-Elf