Server has intermittent high CPU that cripples server

We have a Server 2003 quad core processor HP box that is running as a file server. It is not running any applications. Even the Trend Microware anti-virus is turned off on this machine.Sometimes once a day and sometimes once every few days the CPU's will go up to almost 100% usage and stay there. Users cannot access the server while this is going on. After ten to twenty minutes the CPU will come back down on its own to normal CPU levels. When this is happening Windows Task Manager shows that the SYSTEM process is using all of the CPU. I am going to put Process Explorer on this machine so that I can see more information on the SYSTEM processes. Can someone help me troubleshoot this further so that I can eventually find a solution? Is there something more that I can do to track down the problem?
HJBrAsked:
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debuggerauCommented:
you may not even need process monitor.

I use this process.

Firstly find the process in the task manager and take note of the PID column number.
Then run tasklist /SVC from a command line which will give you the services for each system process. you can then fault find that service and its particularities.
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debuggerauCommented:
Sure, performance monitor (perfmon) is a good utility to see these things..
Especially when looking at disk activity and page file usage.
Also Processor interrupts and memory usage are must haves..
I'd suggest adding network connections also..
you can export the graph and go from here...
But the new process monitor is a beauty, still recommend trying that too...
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HJBrAuthor Commented:
How do you add Network Connections? Is there a setting in Process Monitor for this?
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debuggerauCommented:
No, my comments are for perfmon, process monitor can show you process activity during that time though...
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ChiefITCommented:
Process explorer was your best bet. That can pinpoint the problem child program to the thread it is running.
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mattaobCommented:
Have you had a look in the event viewer to make sure this isn't a hardware issue (disk problems or similar) manifesting itself
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HJBrAuthor Commented:
Yes I have, thank you.
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HJBrAuthor Commented:
Thank you for clarifying. I will try to setuo ProfMan.
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ChiefITCommented:
Few system services would be scheduled like that:

Here are all I can think of:
1) Windows Updates automatic updator
2) FRS replications
4) Volume Shadow copy
5) AV software scans

When are these services configured to scan, update, replicate or copy?
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