SOLVED: How to Determine The Last Time Your PC Was Booted

There are four ready ways to figure out when your computer was booted (or rebooted):

Task Manager Shows Up Time:

Command Prompt To Show UpTime:

systeminfo | find /i “Boot Time”

System Boot Time:          20/03/2015, 12:03:04 PM

PowerShell 3 Command To Show Boot:

Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime

For more information see THIS TechNet article.

WMI Command To Show Boot Time:

wmic os get lastBootUpTime

LastBootUpTime
2015032014403.105679+120

Note that this is in Milliseconds.

For more information see THIS article.