Constant CPU usage at idle

Hi all,

I've got a problem with my PC - I've searched high and low but can't find a solution - any help would be really appreciated.

When it's idle I noticed that my CPU usage was hovering around the 20% mark (I only noticed as I could hear my CPU fan speed up). As soon as I move the mouse to turn the (blank screen) screensaver off, the CPU goes back to 0% usage.

I'm trying to track down the offending process using Process Monitor (in particular the Event Profiling option). The process that is affecting my CPU is svchost.exe - which I know is the host for a number of services. I checked the PID and using Task Manager, checked what proesses this particular one was hosting:

UxSms
UmRdpService
TrkWks
SysMain
PcaSvc
Netman
IPBusEnum
hidserv
AudioEndpointBuilder

I also filtered my Process Monitor log to see events that were logged to that svchost.exe. What I found was an entry for every single directory on my C and D drives - see the following extract:

svchost.exe 1136 CreateFile D:\MY DOCUMENTS\My Music\Music\FLEETWOOD MAC\RUMOURS (EXPANDED & REMASTERED) - DISC 1 SUCCESS Desired Access: Read Data/List Directory, Synchronize, Disposition: Open, Options: Directory, Synchronous IO Non-Alert, Complete If Oplocked, Open For Backup, Attributes: n/a, ShareMode: Read, Write, Delete, AllocationSize: n/a, Impersonating: NT AUTHORITY\SYSTEM, OpenResult: Opened


svchost.exe 1136 SetBasicInformationFile D:\MY DOCUMENTS\My Music\Music\FLEETWOOD MAC\RUMOURS (EXPANDED & REMASTERED) - DISC 1 SUCCESS CreationTime: 01/01/1601 00:59:59, LastAccessTime: 01/01/1601 00:59:59, LastWriteTime: 01/01/1601 00:59:59, ChangeTime: 01/01/1601 00:59:59, FileAttributes: n/a


svchost.exe 1136 FileSystemControl D:\MY DOCUMENTS\My Music\Music\FLEETWOOD MAC\RUMOURS (EXPANDED & REMASTERED) - DISC 1 END OF FILE Control: FSCTL_FILE_PREFETCH


svchost.exe 1136 CloseFile D:\MY DOCUMENTS\My Music\Music\FLEETWOOD MAC\RUMOURS (EXPANDED & REMASTERED) - DISC 1 SUCCESS





I have no idea if this is normal!

Any help you can offer would be appreciated - I leave my computer on for extended periods and I really don't want the CPU sitting there at 20% usage with my HDD constantly being accessed!

Thanks,

Nick