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  1. #16
    Joined
    Mar 2012
    Posts
    1

    Re: Windows 7- system using high CPU intermittently

    This bug is actually driving me nuts.

    I tried to open cmd prompt as admin, and type these lines :
    sc stop "LmHosts"
    sc config "LmHosts" start= disabled

    The bug stopped for about 46h. Then the ghost returned to my machine and froze it up again.

    ;(

    What am i doing wrong ?

  2. #17
    Joined
    Apr 2012
    Posts
    1

    Re: Windows 7- system using high CPU intermittently

    I am having a similar problem, I tried the fix from mcc to no avail.

    Through process explorer I have tracked it down to "iaStor.sys+0x43e0". I have no idea what is causing it, however it spikes to anywhere from 50% to 100% processor utilization, and badly hangs my system.

    Any help would be GREATLY appreciated!

  3. #18
    Joined
    Feb 2014
    Posts
    1

    Re: Windows 7- system using high CPU intermittently

    Quote Originally Posted by mcc View Post
    I think I've finally and completely solved the issue. After some deep digging I finally found KB955860 for W2k3. Apparently there's a semi-infinite loop bug wherein the machine makes a massive number of lookups to the LMHOSTS file on machines with multiple NICs. It would seem to appear that this also applies to Windows 7 RTM since the issue appears to have been solved by workaround 2- disabling LMHOSTS lookups altogether.

    Again, this happens on two very different machines. The similarities between my laptop and desktop end with a Core2 architecture CPU, Intel chipset and ATI graphics. This seems to be a genuine bug that MS should look into fixing.
    I would like to thank you very much, mcc... I was suffering with this issue for almost three months... trying several things like the others who have posted here too, without any success.

    I just stopped and disabled the lmhosts service (TCP/IP NetBIOS Helper) and the CPU utilization fell down immediately!

    God bless you, man!

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