I was deleting useless programs that I didn't need and i accedenty deleted my Realtek high definition audio driver. so I reinstall it and the sound worked perfectly without having to restart my computer. I restart my computer anyway because it said I should. then sound doest work again. So I reinstall them again without restarting my computer and sound still don't work. Then I restart my computer and sound still don't work. I did this about 5 times and nothing helped. When I go to my drivers it has about 5 copies that say "Realtek audio driver" and all have a yellow triangle but one. When I click properties to says "this device is working properly" but it's not. someone, please help. If you need any further information, I will provide.