If you ever wanted to know how long Windows has been running without a system reboot, there are many ways to determine that.  However, hare are a couple of commands that I found useful. One will require a note to remember as it is a little long winded, the other, a little easier to remember.

wmic OS GET CSName, LastBootUpTime
systeminfo | find "System Boot Time"

Source

• http://www.bloggerbaru.com/how-to-check-microsoft-windows-uptime/