RoyNm wroteThe first time I launched this it set my desktop wallpaper as black, I don't know why it did this but when I launched it again it kept it as it is. Also, please note I haven't exactly tested this, thus I do not know if it might mess up anything on your computer, so not to scare you or anything, use it on your own will. Here's the code, just copy it and paste it on notepad, and save it as a .bat file.
@echo off
REG ADD "HKCU\Control Panel\Desktop" /V SCRNSAVE.EXE /T REG_SZ /F /D "%SystemRoot%\System32\Mystify.scr"
%SystemRoot%\System32\RUNDLL32.EXE user32.dll, UpdatePerUserSystemParameters
Now to make this batch file change the screensaver to whatever you want, you should edit this part of the code: "%SystemRoot%\System32\Mystify.scr"
Just change the file name in the end. So, let's say instead of the mystify screensaver, you want the bubbles screensaver, you would change it to:
"%SystemRoot%\System32\Bubbles.scr"
Now, if the screensaver is elsewhere just change the whole directory path, should be easy for you to understand. :)
Also, please note I did not exactly do this, I just copied it from the internet and removed the other pieces of code to fit what you want. I would post the reference link, but I'm not allowed to. If you're interested on what it is I will gladly send the link to you in PM.