I have no sound other than just an "air" sound on my computer now. I get an error C00D11B1 and don't know what to do about it. My computer says that Realtek is working and I even changed out the chord running from my monitor to my hard drive and nothing has changed. I also upgraded Real Player to the latest version 11 and still nothing. If I try to run a sound test on my computer I get "Test Failed". Is it the sound card? I thought Realtek IS the sound card??? Can someone please help me as I've wasted hours of my life on this...ughhh!!! Thanks!!!