I am running Windows XP Professional, 2.4 GHz Intel Celron processor, 40GB Ultra DMA hard drive. I have WMP11 and I have no sound. I have sound on aol, real player, and quicktime. I have customized my media player and selected RTP once and then QTP. Both times once I selected a media player as default, that media player would no longer have sound. I tried doing a repair on Windows XP, but when my computer restarted, I got the error message ALCXMNTR.EXE Bad Image c\WINDOWS\system32\DSOUND.dll is not a valid Windows image.Please check this against your installation diskette. I have tried updating directx, but I get an error message during installation. I would welcome any ideas at this point.