A simple PS command to get a system’s LastBootUpTime using PowerShell.
# Local Computer
Get-CimInstance -Namespace root\cimv2 -ClassName Win32_OperatingSystem | Select LastBootUpTime
Use the following for getting LastBootUpTime for a remote system.
# Remote Computer
Get-CimInstance -ComputerName <systemName> -Namespace root\cimv2 -ClassName Win32_OperatingSystem | Select LastBootUpTime
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