Today I logged onto my computer and started playing games I played csgo and m&b. On M&B I used to get around 300 fps, now only 47! On csgo I only get 70fps instead of 200. I'm really concerned about this. About 2 months ago my screen randomly went black or restarted automatically, It kept happening until windows stopped working and went corrupt I had to reinstall it. About a month later, I was on skype and it suddenly stopped working. Then I went on my browser and on youtube the video won't play and it kept saying shockwave flash not responding on chrome. All audio and video stopped working and everything kept crashing. I reinstalled my graphics driver and It started working again but a day later same thing happened. This happened three times and then stopped for 2 weeks. Then I started having boot loops and I had to mash enter for the login part to come up. when I log in it flashes for a second this happens whenever I turn on my pc. Now I get way less fps than usual. I have a gigabyte h81m-h motherboard, gtx 750 graphics card, corsair 8gb ram, i7 4790 and a evga 500b power supply. I've searched a lot for viruses and the antivirus couldn't find any. So it's probably hardware but I don't know which part it is.