The sound on my computer stopped working after i moved it. I checked all the cables & i'm pretty sure they're all plugged into the right places. I also tried plugging head phones in, but that didn't work either.
The reason i moved it, was because my wireless randomly stopped working. It's still not working, i've got it plugged into my modem via a cable and that works.
In terms of viruses. I've run "Superantispyware", "Malwarebytes' Anti-Malware", "spybot search and destroy". I also have "AVAST" and "Spyware Blaster". Still no sound.