Alright guys, so I recently bought a new computer (windows7), it ran minecraft perfectly at like, 300fps. Sounds and all, full settings, blah blah blah. I upgraded to windows8 and it still runs minecraft no problem, but there's no sounds apart from breaking and placing blocks. When I walk I hear nothing, I kill an animal, open a chest, fall from great height. No sounds not even button clicking in the main menu.
When I upgraded my OS, I needed to reinstall all my drivers, which I have done. Could anybody please tell me, or give me tips on what's happened. I play BF3 and DayZ perfect on highest at around 50fps. Sound is fully working. It just doesn't like minecraft.