I used AutohotKey to make a program that when you press the “Scroll Lock” button your cursor will disappear. Not sure why the Windows OS doesn’t come with a hotkey or combination of keys to hide the cursor. Personally, I think that would be a great built in feature for a multitude of reasons. The first being programs that lock the cursor in the middle of the screen and won’t let you hide it. Second being if you’re watching a video and the cursor won’t hide itself for some reason. I’m sure there’s even more reasons then that, but here is the program absolutely free of charge. No installation necessary, just run the program and you’re good to go!
This is a .exe program and not an autohotkey script, so not additional software required.