NIS 2010 - How many ccsvchst.exe processes should be running?

Does anyone know how many instances of ccsvchst.exe should "normally" show in Task Manager?

 

I am used to seeing two,  but since I applied the recent HotFix to resolve the disappearing system tray icon problem, I now see four ccsvchst.exe processes running.

 

Two show memory usage of over 9,000K and two show memory usage of 300-500K.

 

Two show  the User Name as "System" and the other two show the logged on user.

 

I am curious about what role each is playing...