IT Toolbox
IT Toolbox

Show Windows last boot and uptime

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Show Windows last boot and uptime

Calculates how long Windows has been running without full restart.

Command / script 
$OS = Get-CimInstance Win32_OperatingSystem
$Uptime = (Get-Date) - $OS.LastBootUpTime

[PSCustomObject]@{
    DernierDemarrage = $OS.LastBootUpTime
    Jours             = $Uptime.Days
    Heures            = $Uptime.Hours
    Minutes           = $Uptime.Minutes
}

When should you use it?

Use this to confirm whether a workstation really restarted after an update or incident.

What the script does

  • Windows exposes the last boot time through Win32_OperatingSystem.
  • The script then calculates the elapsed uptime.

Precautions

  • Windows Fast Startup can sometimes make a shutdown and power-on look different from a full restart.

Rollback

No changes are made.

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