PowerShell Script to add Operating System Install Date in Registry

 $Date = Get-date 

$Registry = "Registry::HKLM\SOFTWARE\CompanyName"

$Registry1 = "Registry::HKLM\SOFTWARE\CompanyName\OperatingSystem"

$name = "OperatingSystem"

if (!(Test-Path -Path $Registry))

 {

  

  New-Item -Path $Registry -Force | Out-Null

  New-Item -Path $Registry1 -Force | Out-Null

  New-ItemProperty -LiteralPath $Registry1 -Name $name -Value $Date -PropertyType 'String' -Force | Out-Null

 }

Elseif (!(Test-path -Path $Registry1))

 {

   New-Item -Path $Registry1 -Force | Out-Null

  New-ItemProperty -LiteralPath $Registry1 -Name $name -Value $Date -PropertyType 'String' -Force | Out-Null

 }

 Else

 {

 New-ItemProperty -LiteralPath $Registry1 -Name $name -Value $Date -PropertyType 'String' -Force | Out-Null

 }