Move the SCR file to your main Windows directory. For example, in Windows 10/11, move your file to the C:\Windows\System32 directory.
In the Windows search bar, type "screen saver." Select the Change screen saver option from the search results.
The Screen Saver Settings window appears. From the Screen saver dropdown menu, select 1337. Customize the remainder of your screen saver settings, and then click Apply.