Set up ScreenSave via registry in order to change GPO - Microsoft Q&A
Screen Saver GPO being overridden!
Client Management: DRZKZ-5766 - The registry management steps write in HKEY_USERS instead of HKEY_CURRENT_USER when it's ran as the current user - Knowledge Article - BMC Community
Fix: Screen Saver Settings Greyed out in Windows 10 / 8 / 7 | Password Recovery