PLEASE HELP QUICK: Computer is slow as can be after windows update

I'm on windows 10 and last night my computer did an update, now its slow as can be and unusable. System restore was turned off for some reason and I have no restore points. I uninstalled the update last night and it let me install the one update, but not the other update which says "Security update for microsoft windows".

WHat options do I have? I would just go head and install windows 11 and hope it would get rid of this problem. I don't have the option as of right now for windows 11, although it asked me probably 3 weeks ago if I wanted to install it.. Please help I hate this, I use my computer for everything.