Windows/Screen Saver
< Windows
HKEY_CURRENT_USER\Control Panel\Desktop ScreenSaveActive 0
Then restart your computer or log out and back in to apply the changes.
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HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Windows\Control Panel\Desktop ScreenSaveActive (REG_SZ) - 0 ScreenSaveTimeOut (1800) - 9999
ref: [1]