The below bit of PowrShell will return the uptime and last boot time stamp of a remote Windows computer.

Change the $server variable as needed.

PowerShell uptime snippet

Author: Phil Eddies

I am an IT Operations Manager, managing all aspects of the IT infrastructure and service for a mid sized UK based company. I have been working full time in IT since 2001 in 1st to 3rd line and System Administration roles. MCSA, MCSE, CCNA, Citrix CCA