Ccsvhst.exe is using 50% of my CPU

 The process ccsvhst.exe is using 50% of my CPU most of the time I am using the computer.  How can I stop this?  My Fan is running all the time!

 

I have Norton 360 version 6.4.0.9.  I have windows 7 home SP1.  3GHz processor and 6GB RAM.