Been working on this problem for more then a week now all most 2. The sound for all most all my programs will not work(games and music player). I do have all system sounds full sound from the internet, also one game Just Cause 2 gives me sound also. WMP gives me a error depending on the file extension type and will not play anything. It is Realtek on board sound. In the HD audio manager if i click test sound it will not play but if i go to Playback devices the test sound plays.
What i have been doing to try to fix problem, Reinstalled the driver about 5 times. Useing CCleaner to clear reg after unisntall, used driver sweeper to remove any left over files and installed new driver after reboot. I had all sounds working before for a day by ending the HD audio manager but that dident last and no longer works. I can also play any music or game sound from the games directory in Irfan View that i use for my crappy retextures. Please help not having sound from my games is bugging the crap outta me.
Go to start / run and type DXDIAG.exe to see if it reports any problems and do checks. The only other thing I can think of is to remove the drivers and use a different set of drivers. I have read that somewhere that realteks updated drivers cause similar problems and by installing earlier versions has fixed the problem. Apart from that all I can suggest is to buy a usb soundcard which are very cheap now