About 2 days ago my computer started acting funny and it would not connect to the internet and not be able to do several other tasks. I ran a repair install on my Windows XP Media Center Edition and everything was fixed after the repair install, updating Windows and ect. But I noticed that when I went on the now working internet and see a video, I get no sound. I look at the task bar on the far right for the volume controls and the volume controls are not there. I opened a Mp3 file on my computer with Widows Media Player 11 and VLC Media Player and I can hear it just fine. I next went into my control panel and tried to fix the problem there. The volume controls are not there either because Windows says that I don't have a sound mixer installed when I have a Sigmatel Integrated sound card on my system. Next, I tried disabling the audio, restarting my computer, enabling the audio, and restart my computer again. Nothing. I tried to update my drivers. Still no audio. When I try reinstalling or installing the audio card, a window pops up saying that the drivers were installed but that there was a error during the installation of the device. That a device attached to the system is malfunctioning. The pic is below.
I have also tried going into the control panel and playing system sounds like critical stop sounds and error sounds like the Windows troubleshooter suggested. I get an error saying that the sound cannot be played. That the sound card might be in use. Pic is below.
I have also gone into DirectX Diagnostics and I run the sound test on there and it works fine. All the tests pass and I can hear the test sounds in my speakers. I don't know what else to do. My speakers worked fine before the repair. I would really appreciate any help.