Script for getting last reboot timestamp (2008r2)

Solution 1:

Nixphoe's answer is definitely correct, but I want to add on how to get lastbootuptime for the multiple computers (the output can also be redirected to a file if needed):

Get Last Boot Time for Multiple Machines

$compname = Get-Content -Path C:\computers.txt
foreach ($comp in $compname) {
    Get-WmiObject win32_operatingsystem -ComputerName $comp| select CSName, @{LABEL='LastBootUpTime';EXPRESSION={$_.ConverttoDateTime($_.lastbootuptime)}}

}

C:\computers.txt - put computer hostnames one in a row here

Solution 2:

For me, systeminfo is really slow. If you have powershell 3, you should be able to use something like

Get-CimInstance -ComputerName $yourcomputerObj -ClassName win32_operatingsystem | select csname, lastbootuptime

or

Get-WmiObject win32_operatingsystem -ComputerName $yourcomputerObj | select csname, @{LABEL='LastBootUpTime';EXPRESSION={$_.ConverttoDateTime($_.lastbootuptime)}}

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