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Constant CPU usage at idle

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  • Windows 7
  • CPUs
Last response: in Windows 7
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October 2, 2014 2:42:10 AM

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

More about : constant cpu usage idle

a b à CPUs
October 2, 2014 3:15:41 AM

Windows is finishing some tasks of maintenance in background . No issue . .
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October 2, 2014 3:36:16 AM

Thanks for the answer, but that doesn't really explain why this PC constantly uses 20% of CPU at idle. I don't have this issue with any of my other PCs.
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a b à CPUs
October 2, 2014 11:33:52 AM

Check for viruses
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October 2, 2014 11:59:47 AM

rockie_ said:
Check for viruses


Sorry - I should have mentioned - I've run an Avast virus scan and a Malwarebytes scan - nothing.
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a b à CPUs
October 2, 2014 12:21:24 PM

nicopolous said:
rockie_ said:
Check for viruses


Sorry - I should have mentioned - I've run an Avast virus scan and a Malwarebytes scan - nothing.


Disable them and try again .
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a b $ Windows 7
a b à CPUs
October 2, 2014 12:34:13 PM

Boot into safe mode and run hitmanpro and ccleaner registry cleaner.
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!