A lot of people had this problem. Several posts about it here. Sunday morning there was a new nvidia driver. After install, all worked fine for me.
very disappointing result after the 1st round of the ranked championship. game crash without a single error message. pc just goes back to desktop, and the game is completely shut down. as a result I now have -14,364 rating and -7,013 reputation. Anyone have the same problem, or maybe a solution? this is very frustrating. and the fun wears off quickly this way.