If (!(Test-Path "HKCU:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows")) {  
    New-Item -Path "HKCU:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows" | Out-Null }  
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows" -Name "LegacyDefaultPrinterMode" -Type DWord -Value 1