PowerShell Uptime and Reboots

Hello all, more powershell fun. How often are you trouble shooting an application install or “insert error here” and the end user says, “Yes I rebooted!!!”.  Not that we don’t trust the end user, but it helps to be able to verify that the computer was rebooted. Here is a small script I use to determine the computer uptime and reboots, it will show who rebooted it and why.  To load the function save and run the script. The function can be called from the PS session.  This can be added to your PS profile to load when you start a PS session.

The script is made up of 2 functions.  One for determining the computer uptime and the other to read the event log and report on reboots.

You can either run it on a single computer or supply a list of computers from text file with one computer per-line.

Get-rebootInfo  -computername  “server”

Get-Content computers.txt | ForEach-Object { Get-rebootInfo -computername $_}



Function Get-rebootInfo {

## Computers
#Adds a title section to the output with Date, computer ran on, and Uptime.
“Server Reboot Report”
“Generated $(get-date)”
“Generated from $(gc env:computername)”
“Genertaed for $Computername”
Get-Uptime $computername

Stores the events in a hash table for faster parsing and reporting.
Get-WinEvent -ComputerName $computername -FilterHashtable @{logname=’System’; id=1074} |
ForEach-Object {
$rv = New-Object PSObject | Select-Object Date, User, Action, Process, Reason, ReasonCode, Comment
$rv.Date = $_.TimeCreated
$rv.User = $_.Properties[6].Value
$rv.Process = $_.Properties[0].Value
$rv.Action = $_.Properties[4].Value
$rv.Reason = $_.Properties[2].Value
$rv.ReasonCode = $_.Properties[3].Value
$rv.Comment = $_.Properties[5].Value
} | Select-Object Date, Action, Reason, User

#function used to get LastBootUpTime from Win32_OperatingSystem class and calculate uptime based on the local system time.

Function Get-Uptime {
Param([Parameter(Mandatory = $True,
ValueFromPipeLine = $False,
Position = 0)]
[String]$ComputerName = “localhost”
)#END: Param
$LastBoot = (Get-WmiObject -Class Win32_OperatingSystem
-computername $ComputerName).LastBootUpTime
$sysuptime = (Get-Date) –

Write-Host -foregroundcolor cyan "($ComputerName) System uptime is:"

}#End Function Get-Uptime


By |2016-04-12T11:05:58+00:00September 2nd, 2015|PowerShell|0 Comments

About the Author:

Chris Meyers
Consultant – Model Technology Solutions Chris has more than 20 years of industry experience. Prior to his work with Model, Chris worked for one of St. Louis’ largest law firms where his responsibilities ranged from implementing Citrix to automating desktop deployments to virtualizing the datacenter. He has also worked with Microsoft’s Rapid Deployment Program to bring new technologies to one of the three largest consumer credit reporting agencies in the US.

Model Technology

Let us help you get your end point and data center strategy on cruise control!  Ask about our Calibration Assessment.


  • 12125 Woodcrest Executive Drive, Ste. 204 Creve Coeur, MO 63141
  • (314) 254-4138
  • sales@model-technology.com