Quote Originally Posted by Carmentisis View Post
That can sometimes happen on wireless keyboards if say it needs new batteries or the keyboard itself is out of range. But Im thinking here that with running the game and an internet browser at the same time, it could be putting some stress on your processor(s). Maybe try closing down some background things if you have them running such as Skype or music to see if that helps.
I don't have a wireless keyboard. Also this has never happened with any other game before and I have played more games than I can remember with this particular setup.