Changing the following registry entry to "0" will disable auto loading of the comm center. We are planning on doing this company wide, as alot of the Autocad freeze up's we are seeing are directly related to it.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R17.1\ACAD-6001:409\Applications\InfoCenterAcConn]
"LOADCTRLS"=dword:00000000
"LOADER"="C:\\Program Files\\AutoCAD 2008\\AcInfoCenterConn.DLL"
"DESCRIPTION"="AutoCAD InfoCenterAcConn addin"
"MANAGED"=dword:00000001
This is for Autocad 2008, the "R17.1" string in the key address will be different for different versions of Autocad.