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CPU spiking issue

I've got a CPU spiking issue on a server where it just stays at 80-95% CPU and I can't figure out what's causing it.

Nothing shows in Task Manager that points to it, or Resource Monitor, or what I can see through SQL.

Can anyone see anything based off the attached screenshots or advise what else I could check to try and track it down?
cpu1.JPG
cpu2.JPG
cpu3.JPG
cpu4.JPG
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PeterErhard
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PeterErhard
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johnb6767Commented:
I think Process Explorer will give you a better view, and also a history graph to show what is spiking....
http://live.sysinternals.com/procexp.exe

It will also show you DPC's and Interupts, which you cannot see in the Task Manager...
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PeterErhardAuthor Commented:
Thanks John.

See the attached screenshot. Nothing there that points to why the server is running at 85% CPU either. This is really bizzare.
cpu5.JPG
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johnb6767Commented:
Any errors in the event log? Ive never seen Process Explorer not be able to account for it all...

Unless you have a Rootkit perhaps, thats hiding from the system....

Does the same behaviour occurr in Safe Mode (if you can bring the server down briefly?)
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binary_1001010Commented:
probably some hidden services. are you running any virtual application?
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PeterErhardAuthor Commented:
Thanks guys. We're going to reboot the server tonight we've decided. I'll post back if that resolves a problem if it still occurs.
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PeterErhardAuthor Commented:
Apologies for the delayed response, a reboot cleared the issue.
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