CPU on Domain Controller (Server 2008 R2) is maxed at 100%

All our DC's appear to be affected by this, where the CPU is spiked to 100%. WmiPrvSE.exe and svchost.ext fluctuates and switches back and forth consuming all CPU. What do these .EXE do, and what can I do to resolve this matter? At the moment, we'd like to find out why this just suddenly happen. There has been no recent change in our environment.

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joukiejoukAsked:
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Rich BullockIT Systems EngineerCommented:
This process is a system process but it's one that malware likes to infect. Be sure to scan the DC right away to ensure its not that to begin with.
Next, there must have been somethings that's changed... Can you run a perfmon /rel  from the run command window. This will show you changes in the system (software) and give you a visual of any event errors. If you see anything else that can help from this info please post it.
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Mal OsborneAlpha GeekCommented:
First step would be to go to services and restart Windows management Instrumentation service. It will also cycle dependant services.
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
How many DC's in total?

There is a hotfix for this issue https://support.microsoft.com/en-us/kb/970067

Would also recommend doing a full windows update on one of them before looking for a virus that problably is not there.

Anyway failing that I would search for a virus using Mcafee stinger and spybot. maybe a rootkit detector too.
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Anand PandyaCommented:
Moreover if you want to see which services are running behind svchost.exe, you can go to command prompt and type the below command:

C:\> tasklist /svc /fi "imagename eq svchost.exe"

After running the above command you will be able to see PID, and services which are running under svchost.exe, because svchost.exe is a container and multiple similar services could be running under it.

Several times it has happen that svchost.exe is using high cpu and after checking it is found that windows auto update is running which is using high cpu (what I have observed)
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joukiejoukAuthor Commented:
None of these solutions offered helped. We decided to add another CPU to the DCs to alleviate this problem.
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Windows Server 2008

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