Windows Audio won't start....MMCSS service

[mtrox]

Upgraded a client's Toshiba Vista Ultimate to SP1. Now the audio won't work.
The Windows Audio Sevice is set to "Automatic" but when I try to start it, I
get this error:

Error 1075: The dependency service is not started or is marked for deletion.

All dependent services are running. And if I check the Event viewer, I also
see:

Event 7003. The Windows Audio Service depends the following service: MMCSS.
This service might not be installed.

I don't know that service and don't see it listed in the MMC. I also see
this problem in Google from some others. Is it a common problem? Right now
client has no sound...just a red X over the volume icon down in the sys tray.

 

[Not Me]

My first thought would be to remove the sound card and allow it to reinstall
the driver, that should reset things.

 

[mtrox]

Thanks Not Me, but already tried that a couple times. No Joy.

 

[Not Me]

Have you checked for an updated sound driver or motherboard/chipset drivers?
I have a machine that required a BIOS update for the onboard sound to work
properly.

 

[mtrox]

Yep. No update for the chipset, but did the sound driver and BIOS. Still
the Windows Audio Service will not start.

 

[Not Me]

sfc /scannow from an elevated command prompt?

Yep. No update for the chipset, but did the sound driver and BIOS. Still
the Windows Audio Service will not start.