So two days ago my Laptop (Asus RoG) randomly shut down without any advanced warning. I couldnt turn it back on again for a good 2 minutes or so (He didnt run out of Power or the likes).
After I turned it back on it started to do a windows update which took a while and after that everything was peachy again.
Except it wasnt
Ever since the update the boot up has been weird, when I turn it on I get the Asus loading screen, then a black screen where I can see and move the mouse for a good 30 seconds and then I get the normal Windows splash screen.
The worst of it all though is that I get hardcore stuttering and frame drops while gaming (WoW and Dota2) which havent been there before the random windows update.

I have since updated to the even latest Windows version and have checked and updated every single driver I could find.
I dont know what else to do now

Any halp?