PC slowing down and errors

[sil130]

My problem right now is my pc suddenly went so slow, i dont know what happened but it started when there was a windows popup or something ( on the lower right of the screen) that tells me there are driver errors or something. Before I manage to click it, my pc crashed. After that I did the start up repair and went on fine, but theres something pops up "LiveUpdate.exe - Bad Image" and things i dont understand. I think it is a malware maybe? And after that my pc has so many crashes, just right now I cant open my pc, it is stucked on black screen after windows logo, luckily I managed to fix it on startup repair but now it is really slow. the bootup took 1 min i guess and my windows task bar is not working.

 

CPU: i5 3770k

Running on Windows 8

 

Any solution would be greatly appreciated thanks!