Windows/Screen Saver

Trigger Screen Saver From Command Line

run:

scrnsave.scr

the screensaver is called scrnsave.scr, located in %SYSTEMROOT%\system32

cmd /c scrnsave.scr /s

ref: https://superuser.com/questions/247839/how-can-i-make-my-screen-blank-by-a-shortcut

Disable Screen Saver

HKEY_CURRENT_USER\Control Panel\Desktop
 ScreenSaveActive 0

Then restart your computer or log out and back in to apply the changes.

--

HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Windows\Control Panel\Desktop
 ScreenSaveActive (REG_SZ) - 0  (was 1)
 ScreenSaveTimeOut (1800) - 9999  (was 1800)
 ScreenSaverIsSecure (REG_SZ) - 0  (was 1)

ref:

--

disable_screensaver.reg :

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Control Panel\Desktop]
"ScreenSaveActive"="0"
"ScreenSaverIsSecure"="0"
"ScreenSaveTimeOut"="9999"

[HKEY_CURRENT_USER\Control Panel\Desktop]
"ScreenSaveActive"="0"