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Old 05-03-2012, 04:14 PM   #1
EduCat's Avatar
Join Date: Feb 2012
Location: Chicago
Posts: 182
Default Microsoft UAA HD Audio Driver Causing 100% CPU

Hello everyone,

I have an older PC (2.8ghz P4 HT) that does not have a pci-e slot. I wanted to be able to watch HD videos somewhat so I ended up finding an Radeon HD 2600 agp card. I used the latest Windows XP hotfix because the regular drivers would not even detect the card.

The problem is, is that there seems to be hardware interrupts occurring, causing 100% cpu usage and crippling performance.

I've scoured the internet and have found that it seems to be the MS UAA HD audio driver that is causing the problem. As soon as I disable the driver, everything goes back to normal. I have a separate sound card for sound. I can't seem to resolve this.


I did find a somewhat tacky solution, which was to use devcon and a .cmd script to disable the UAA driver on startup. However I can't get it to work right, feel like such a n00ber. (So maybe if someone knows how to get the script to properly work.)

I put the extracted devcon files (folder i386 i think?) In my windows/system32 folder. In the .cmd file I have 'devcon disable pci\cc_0403' I believe the UAA driver is loaded after the catalyst software. It's driving me nuts that I can't figure this out on my own. lol

If anyone has any suggestions, I would greatly appreciate it. Thanks
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Old 05-03-2012, 08:44 PM   #2
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Join Date: Jan 2011
Location: Québec Canada
Posts: 3,279

what is your system spec.
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Old 05-03-2012, 11:14 PM   #3
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Join Date: Aug 2001
Posts: 33,048

The vendor's drivers should disable that sound device on the card, eliminating the interrupts. Can be a bit dicey getting those drivers on, because until they are loaded, the system will run bog-slow.
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Old 05-03-2012, 11:48 PM   #4
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Join Date: Feb 2012
Location: Chicago
Posts: 182

@denis -

It's an MPC brand comp: clientpro 565

P4 2.8ghz HT
2.5gb RAM
Not positive on the motherboard but I believe it's the intel925express chipset.

@virtuallarry -

Which vendor drivers are you talking about. My sound card drivers? Or my motherboard drivers?
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