default windows applications rules

Does any one know what rules to set for the following essential windows applications?
udp or tcp or else, in- or out-going?

svchost.exe
services.exe
System <— what do I do with this one?
explorer.exe
and any other built in windows applications that need access, I don’t know what they are.

I need to know the rule set for win2k.
I know services.exe is for xp, but I still wanna know what rules to set