I’ve been having this issue for a long time and I don’t have any idea what it is. But certain games (Fallout 3 / NV, Call of Duty WaW (CoD4 is unaffected), and Mirror’s Edge) cause my sound to quit working after I finish playing them. The sound seems to quit sometime after launch, but stays working for the game (youtube for example, won’t play sound if I try to run it in the background) until I close it, at which point it stops working.
Attempting to run FNV gives the error “No sound device detected; Fallout New Vegas cannot run”. Attempting to open a sound file gives the error “Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly”. Several other programs also tell me that there is no sound card installed.
So far the only way I know to fix this is to restart the computer, which gets gets old fast. So I figured I’d ask if anyone has or has had a similar problem and/or knows how to fix it. The sound card is a a Realtek AC97 if that matters at all. So does anyone know what’s wrong or how to fix it?