Ok i can give you some things but im not 100% sure it will work .,but it cant hurt
1) run Disc cleanup its in windows accessories
2) download these programs and then run them in this order
kapersyk TDSSKiller
3a.) iobit malware fighter
3b.)cccleaner
3c.)iobit malwarefighter
3d.)iobit smartdefrag
3e.)iobit advanced system care
3f.)your antivirus ( i use eset smart security, if you dont have one you can get a 30 day free trial)
see if it helps