Windows 11 downloaded but not installed. Is there any way I can prevent it from installing permanent [View all]

(That last word should be "permanently." I ran out of space.)

Anyway, I could have prevented the download from happening, apparently, but I never dreamt that MS would force it on me like this. (Yeah, I know. More fool me.)

Now Windows 11 has been downloaded onto my computer, but I've put off the restart for a while, to keep it from actually installing. Is there any way I can permanently stop it from installing?

Apparently, once it is installed, it looks as if I can choose to go back to Windows 10, but I'd rather just not install it at all.

Any advice would be greatly appreciated! Thanks so much in advance!