Alright, so I know this an XP issue. But what I've noticed with build 7000 and now 7068, is that when I load up my computer and boot Windows 7 the sound works fine in 7. However when I go back to XP after having been in 7 ocassionally the sound is gone. I have a volume icon in my system tray and I can adjust the levels but no sound.
The only fix I have found for this was uninstalling my audio driver
in XP and rebooting my PC and having XP find and install the driver itself. But even then sometimes it doesn't work and I have to do countless reboots before I could get the sound working again.
Anyone else experiencing this?