You'd get shocked but i had the same problem and it turned into normal without me doing anything :S actually i was downloading realtek drivers but didn't think that it'd be this effective :D I really can't understand Microsoft :D
the strange thing is that i have the kinda same problem :redface: i get sound from my speakers but when i plug in a headphone or a speaker system to my notebook, i don't get any sound :confused::confused::(