$Name = "WinZip"
$detection = @()
$detection = Get-ItemProperty HKLM:\software\microsoft\windows\currentversion\Uninstall\*,HKLM:\software\wow6432node\microsoft\windows\currentversion\Uninstall\* | Where-Object {($_.DisplayName -like "$Name*")}
if (!($detection)) { write-host "Installed" }