Environment:
Windows 2008R2 SP1 File Server
Xeon E5630 @ 2.53GHz CPU
4GB RAM
This fileserver is a Hyper-V VM. The host machine's CPU runs at a constant 0-4%. The other VMs are running fine.
We are a school district that is out for summer break. There are only about 10 users on our network currently.
The following process are constantly taking turns running between 80% and 94% - Trusted Installer, mscorsvw.exe, System Idle. When a certain process is not the one running at 80+% it's running at 6% to 20% taking up the rest of the CPU causing the CPU to run at constant 100%.
I keep Windows updates current. I'm currently running a full scan with System Center 2012 Endpoint Protection and Windows Malicious Software Removal Tool. Both were updated today.
I added another core to the VM. It is now peaking at about 85%.