Ran Scannow, now have no Sound, XP with SP3

Ok here is my problem
I was having a problem with the WMI service. I decided to run sfc /scannow
to check and see if it could find a problem (big mistake). While sfc was
running it asked for the Windows CD several times, no problem and then it
finished. When I rebooted I got a Blue screen of Death about a problem with a
device driver. I booted into Safe Mode and disabled the Video & Sound cards.
I then rebooted and that took care of my boot problem. I reloaded the drivers
for each and turned them back on and rebooted. I can now boot up with no
problem. But now I do not have any sound. The Device Manager says the sound
card is working OK but the Control Panel “Sounds & Audio Devices Properties�
says “No Audio Device� I have tried several times reinstalling the Sound
drivers but no luck. I checked the Windows Audio in the services window and
it is running and set for Automatic. I made sure the sound scheme was set to
Windows Default. I even bought a new sound card uninstalled the old drivers
and installed the new ones and the same thing. I checked to make sure the
audiosrv.dll & audiodev.dll were still in the System32 folder and they are.
I then install the Motherboard drivers and guess what my WMI problem was
corrected but still no sound.
I feel sfc has either installed the wrong Dll file or removed one it should
not have but I have no ideal what file it could be as I get no warning of
missing files.
I tried purging the Dllcache and rebuilding it, still no sound.
I have a strong feeling the problem lies with a Register setting. When I go
to “Sound & Audio Device Properties� and look under the Hardware tab I see my
sound card. But yet everything is grayed out under the Audio tab.
I ran DXDIAG, under the Sound tab it says no sound card found but if I go to
the "More Help" tab and click on MSInfo then I/O or Componets\Sound Device,
they both show the Sound Card as being OK.
Did a Repair from my XP Home CD and still have the same problem.
Anyone have any new ideals I could try.