NAV2008 Program Control settings

In NAV2008 under the following path of tabs:

 

I think I may have messed up my settings

 

In NAV 2008 Protection under tabs

Internet Worm Protection

  Program Controls

     Program Rules

       Microsoft Services and Controller Apllication (C:\Windows\System32\services.exe)

 

should the setting be:

Allow

Block

or

Custom?

 

Mine is set at custom and I'm not sure if I messed it up and it should be allow I doubt it would be bloc