NT Kernal & System runs at 30% CPU

The system process "NT Kernal & System" runs continually at about 30% cpu usage even when the computer is not being used.

Vista Home Premium (SP1)

Any ideas would be appreciated.

Thank You

 

Do you have sidebar gadgets installed, maybe check them...

 

Not running a sidebar

 

Rather than play 20 questions, you can go look, don't kill anything unless you know what it is/does.

http://majorgeeks.com/Process_Explorer_d4566.html

 

Ok, I ran Process Explorer:

System Idle Process 0 43.93
DPCs n/a 26.21 Deferred Procedure Calls
Interrupts n/a 11.55 Hardware Interrupts

System 4 18.50
smss.exe 492 Windows Session Manager

In the threads for the System process this is using the cpu
acpi.sys!DeRegisterOfRegionHandler+0x3650