Screen savers are not necessary for virtual machines, to disable Windows Logon Screen Saver:
- Click Start > Run, type regedit, click OK.
Locate the following registry key: HKEY_USERS\.DEFAULT\Control Panel\Desktop
Double-click the ScreenSaveActive string value item in the Details pane.
In the Value data box, replace the number 1 with the number 0 , and then click OK.
Alternatively, you can save the attached registry file and double click it. The key above is set for you (Windows 2000 and 2003 only).