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Kmixer.sys CPU usage and choppy video play

  • Laptops
  • Video
  • Windows XP
Last response: in Windows XP
March 24, 2010 7:52:18 PM

Hello guys, I just joined this forum since I was having problems with my Dell Inspiron 600m laptop. Intel Pentium M processor (1.8 GHz) and 2GB RAM. I have a Mobility Radeon 9000 graphics card.

I just recently reformatted my laptop and couldn't help but notice the horrible video playback. I did a few things such as installing DirectX, updating flash player, and unchecking all non-microsoft related startup processes (msconfig).
My laptop sometimes does great and plays my game at 20-30 FPS, but then after a few minutes, the FPS drops to about 3.
Same with watching videos. It's like looking at pictures really. Thats how bad the choppiness is.

So I decided to do some investigation and installed Process Explorer to look into detail. Turns out that under the System process, there is a thread called kmixer.sys which is a driver for a soundcard I guess. This one thing has spikes in CPU usage up to 70% sometimes.
Another thread to look at under Svchost is krnl or kernel something. Also uses quite a bit sometimes.

I wanted to see if anyone could possibly help me as I would greatly appreciate it. I looked at just about every forum there is about my problems, and still haven't gotten a solid solution yet.

Thank you in advance,

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Best solution

a b D Laptop
March 24, 2010 10:38:06 PM

Please try to install this Microsoft update for XP:

*can you see where kmixer.sys is located? It should be in C:\windows\system32\drivers

If it is located in c:\windows or c:\windows\system32 it might be a camouflaged trojan, virus or other malware.
March 24, 2010 11:39:03 PM

Yes that is where it is located.
I downloaded it but since I have SP3, it just said there was no need for installation, and it cancelled out.
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January 27, 2012 8:37:47 PM

Best answer selected by mousemonkey.
January 27, 2012 8:37:49 PM

This topic has been closed by Mousemonkey