Windows Uptime

(Because supporting the uptime command would be too easy...)

In the Command Prompt

C:\temp>net stats srv | find "since"

Statistics since 10/20/2016 10:02:37 AM

PowerShell v3

PS C:\temp> Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime

csname lastbootuptime
------ --------------
DC1 10/20/2016 11:01:15 AM

It appears that PowerShell doesn't handle the time falling back...

So I created a uptime alias in Powershell. The following will do it in your current shell.

function get-uptime {Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime}
new-alias uptime get-uptime

To make the alias sticky add these commands to the Microsoft.PowerShell_profile.ps1 file in your profile and enable script execution. Where your profile file is at and how to enable script execution are in the links below.

Useful links

• https://blogs.technet.microsoft.com/heyscriptingguy/2013/03/27/powertip-get-the-last-boot-time-with-powershell/
  
• https://technet.microsoft.com/en-us/library/ee176913.aspx?f=255&MSPPError=-2147217396
  
• https://4sysops.com/archives/how-to-create-a-powershell-alias/
  
• https://technet.microsoft.com/en-us/library/ee176961.aspx?f=255&MSPPError=-2147217396