In linux, I can type "uptime" at a command prompt and see how long it's been since I rebooted. In Windows, it's not that easy. However, it can be done by using two command line tools. Simply open a command prompt and type the following:
C:\>systeminfo | findstr /c:"Up Time"
System Up Time: 42 Days, 20 Hours, 36 Minutes, 45 Seconds
