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100% CPU Utilization


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#1 Jester_XJ12

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Posted 10 February 2009 - 03:42 PM

This has me stumped. I have a PC which, per task manager, is constantly running the System process (not System Idle) at 100%. I have at one time or another disabled every start item and any non essential services. Strangely it also runs System @ 100% when booting from a Bart's PE disk (UBCD4 Win). I know what you are thinking: hardware. I booted to a linux live cd and the processor ran fine.

Any ideas?

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#2 Guest_tylerisdabest_*

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Posted 10 February 2009 - 04:05 PM

so im guessing that you prcecses are puting you cpu to 100%

its probibly tons of un needed proceses.

try a scan with your antivirus.

(thats all i can think of)

#3 garmanma

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Posted 10 February 2009 - 08:39 PM

This might help pinpoint the problem
http://technet.microsoft.com/en-us/sysinte...s/bb896653.aspx
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#4 Jester_XJ12

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Posted 11 February 2009 - 12:14 PM

Good call using Process Manager. I narrowed it down to a thread within System named USBPort.sys+0x6086. I unplugged external, front panel USB cables with no joy. I also extracted a fresh usbport.sys to system32.

I will try to roll back the usbport.sys to the sp2 version next. In the mean time, any other ideas?

#5 Jester_XJ12

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Posted 27 February 2009 - 07:55 AM

I was able to find the offending thread from the System process as usbport.sys which would run near 100% of the CPU. The system would return to normal when I suspended it.

After some searching, I found a reference that suggested that I might be hardware related. Since I have replaced or disconnected everything but the motherboard, I have ordered a new one and will replace it. More soon.

#6 Konstantin

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Posted 27 February 2009 - 09:26 AM

Check which software is running when you get the 100% CPU load. With earlier versions of Comodo Firewall, i experienced 100% CPU load os "System" process while running Comodo.

So, load of "System" process can be caused by running software, even if you don't see in task manager that this software is taking much CPU.




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