Excessive CPU Usage

Hi.

 

Recently, my computer was running extremely slow. I checked Windows Task Manager (which took 10 minutes to open) and saw that CPU was constantly at 86%. The culprit turned out be ccSvcHst.exe. Here is a screenshot Task Manager while I am writing this thread: 

 

Task Manager2.png 

 * Windows 7 - Intel Pentium D  915 - 1.5GB RAM @ 533MHz

 

 It's even worse on start up.

This screenshot was taken about 2 hours after start up.

 

I may have coincided with me turning on the back up feature on Norton 360. I'm not sure although the back up utility was VERY laggy while browsing though files and folders.

 

Is this normal? 

Is the only way to fix it, to not use the back up feature?

Is ccSvcHst.exe supposed to not a user name in the task manager? 

 

Thanks