Svchost at 45%CPU

I have a svchost process running that is consuming around 45% of the CPU. Because I have more than one running, is there any way to tell what this particular one is doing/running? The user name in task manager is network service.

Any help is appreciated.

EDIT: I forgot to mention that lately I've been having symptoms of the old blaster worm. When I would resume from standby (and only then) I would get the shutdown message because RPC stopped working. I changed the settings in services.msc to restart RPC on failure and haven't got the error since. I tried the old Symantec removal tool but it didn't find anything. Maybe this is related?

 

I think it has to do something with Windows Update. I had a similar problem with that service and since there is more than one, it was hard to tell which one it was.

 

google is your friend.

 

one svchost.exe process is related to windows update (wauclt.exe). It usually utilizes 50-70% cpu immediately after start up. If you don't want that you can set the windows update to "never check for update" and do it manually.

 

Go to Sysinternals.com and get a copy of process explorer. It will reveal exactly what each instance of svchost is doing.

Gary

 

I disabled Windows Update and rebooted but the same process is still there, though it's only taking about 10% of the CPU now. I'll try Gary's suggestion next.

Thanks all.