Failed bios update causes blue screen?

I have an alienware 15 r2. Its worked great for 4 years. Then i ran support assist over night to install bios 1.8.0 for my laptop. Woke up the next morning and it still didnt install. So i restarted my computer. Tried to install again but now i get a blue screen every time saying driver not less or equal iastora.sys. Also get stopwatch dog or what ever its called blue screen every now and then doing normal stuff. the main problem is now my computer runs horribly! games are unplayable as they are a stuttering mess. Normal windows are also a slow stuttering mess. If i stress my pc by moving stuff or installing multiple things at once i get a blue screen. A gaming benchmark says my cpu is running poorly while my gpu is crystal smooth. I think it could be the bios update that failed and can no longer install. Things I have tried to do to fix:
-Reinstalled windows
-Made sure there was no thermal throttling
-cskdisk checker or what ever its called
-sfc scannow
-made sure there are no viruses through SEVERAL different antivirus program full scans.
-f12 start up screen diagnostic comes back all clear
-support assist comes back all clear other than uninstallable bios update.
Any trouble shooting steps are appreciated.