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But it works on my PC!

The random thoughts of Richard Fennell on technology and software development

Vista high CPU on startup

For a while I have been suffering that when I switch on my Acer Core2 Duo Vista laptop, both cores sometimes go to 85%+ utilization, so the PC is slooooow. Usually after a few reboots it seems to clear. This can happen after a resume from hibernate and complete restart; there was no obvious pattern. Task manager only says that the load is due to the NT Kernel process - so not much help there.

After a bit of google'ing I found other people reporting the problem after installation of Microsoft Network Monitor 3.1, which I did months ago Interestingly I have only seen the problem is recent. However, as soon as I went into the network protocol stack and disabled the network monitor protocol on my WiFi card the problems have gone away.

My guess is some strange race condition caused by a recent service patch; this not a major problem as you can switch the protocol on and off as required without a reboot.

Published Oct 30 2007, 05:12 PM by Richard
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Comments

 

Ghillie Suits » Vista high CPU on startup said:

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October 30, 2007 6:48 PM
 

Yums said:

Thanks for posting this.  Had the same problem where the ndis.sys!NdisInitializeWrapper +0xc3 was consuming all the CPU and memory.

I thought it was related to an Intel Driver issue as noted in this post - www.blogger.com/comment.g

However, I did not find a permanent fix until I disabled the Network Monitor Protocol drivers in the Network Adapter Properties as you noted.  Just to be safe, I also uninstalled Microsoft Network Monitor 3.1.

Thanks again

December 1, 2007 12:21 AM
 

BC Chong said:

Thanks.

I encounter this problem yesterday, & I was struggling to find out the cause but only I read your posting.

Thanks once again for sharing this.

January 8, 2008 1:40 AM
 

Lojza said:

Thanks a lot from Czech Republic.

I had the very same problem, just uninstalling Microsoft Network Monitor 3.1 helped.

I have installed that tool only because of curiosity as well and never used.

January 9, 2008 1:48 PM
 

B-Healey said:

Thanks a ton,  you saved me a couple of hours that i don't have tracking down this issue..  :)

January 14, 2008 5:37 PM
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