I have fixed my video but now my sound doesn't work! Please help.. IDT HD Audio Codec.?

My computer's sound is not working anymore. Its not on mute and the drivers are up to date. I am afraid to uninstall it because i could not find a windows 7 x64 bit driver. If anyone could find a "legit" driver for my computer, that would be so great. That might not be the problem. I installed K Lite Mega Codec Pack and uninstalled it because it did not help and my sound stopped working shortly after. I have tried system restore and all kinds of things like that.. I wasn't able to view video, now I can't hear sound on any program or browser. I would really appreciate any help.. PLEASE