To display screensaver c:\Windows\SysWOW64\ULTRAS~1.SCR (default Ultra Screen Saver Maker screen saver) after 60 seconds, when no users are logged in, set the following registry keys using Command Prompt as Administrator:

reg add "HKU\.Default\Control Panel\Desktop" /v ScreenSaveTimeOut /t REG_SZ /d 60 /f
reg add "HKU\.Default\Control Panel\Desktop" /v ScreenSaveActive /t REG_SZ /d 1 /f
reg add "HKU\.Default\Control Panel\Desktop" /v SCRNSAVE.EXE /t REG_SZ /d "c:\Windows\SysWOW64\ULTRAS~1.SCR" /f


Warning: Be very careful when modifying the registry!