No sound after NVIDIA driver 295.73 WHQL

So today I started my computer, and in the bottom right dock I got a little message (like when widows updates are available) that said there was a new update for my NVIDIA Geforce 310m GPU. I downloaded the 200mb file, and installed after reading the notes. It said it would increase performance, mostly on new games (cant name them (Forum rules) , ones release near the end of 2011) I installed the update, and started playing another shooter, to see if my fps increased. I then started crossfire, and found there was no in game sound. I checked to see if my volume was muted, etc. I restarted my computer, and still no sound. I then reinstalled crossfire, and still no sound. I will try to reinstall my sound card drivers, but I am confused by this, as all other sounds and sounds in all my other games are still working.