I cant help with this :/
Still, things cant change my itself (mostly). You need to remember changes u did to ur PC, meaby something may cause this problem, OR you can try it an other day. Meaby ur windows are do something in background and u just dont know it and it cause you some problems.
Example: I was playing League Of Legends. Ping was ~90 and at next game it jumped to 600+ as a result I was unable to see movement of my character and any movement of any unit. Also when my character died, death cooldown expires and I still had White and Black filter to a screen (it means u are ded) and I was unable even to move my champion because I didnt even saw him <.< so lame. Next day I turned PC on and I saw 40 update files for windows was awaiting to get installed. Windows screawed up my gameplay to do updates I didnt even knew about them.
Sorry, I dont know how to help you. You have to search for help in Internet.