Ascedant

After playing Skyrim for 10 hours without any problems i restarted my computer and wanted to play it more. But now i don't have any npc voice sounds. I tried multiple things that i found on internet but it didn't work, it's all mostly when you have static why npc talks to you, But i don't have any sounds at all when they speak or when i use shouts. Anyone knows what to do with this problem?