Query and restart a Windows service as needed. (PowerShell)

check-restart-windows-service.ps1

<#

Script: "check-restart-windows-service.ps1"
Query and restart service as needed.

Use task scheduler with this script.
Brady M. Shea - 16 Sep 2022

.Setting $ServiceName
.Find the service name to monitor by opening a PS command prompt and entering "GET-SERVICE"

.Setting $SleepSecs
.If your service needs very little time to start, you could set this to 0. But, setting higher will hurt nothing.

#>

# Edit these
$ServiceName = 'MyServiceName'
$SleepSecs   = 5
# Edit these ends

function IsAdminUser  
{  
    $user = [Security.Principal.WindowsIdentity]::GetCurrent();
    (New-Object Security.Principal.WindowsPrincipal $user).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)  
}

if (!(IsAdminUser)) {
  write-host "This script needs to be run with Administrator credentials. Exiting." -Fore red
  exit
}

try {
  $arrService = Get-Service -Name $ServiceName -ErrorAction Stop
  } catch {
  write-host 'ERROR: Service name does not exist. Exiting.'
  exit
  }

$DisplayServiceName = $arrService.DisplayName

if ($arrService.Status -ne 'Running') {
  while ($arrService.Status -ne 'Running') {
    Start-Service $ServiceName
    write-host $arrService.Status
    write-host "SERVICE DOWN! Service starting. Waiting $SleepSecs seconds...`n"
    Start-Sleep -seconds $SleepSecs
    $arrService.Refresh()
    if ($arrService.Status -eq 'Running')
    {
        Write-Host "$DisplayServiceName is now running again."
    }
    else
    {
    Write-Host "$DisplayServiceName failed to start!"
    }
  }
}
else {
    Write-Host "$DisplayServiceName is already running. Exiting."
}