CIS3 & CIS4 Mixed environment - internal network blocked

After upgrading to CIS4 on my main PC and allowing my PC to be seen by other PC’s on the network - allow file and printer sharing - my Laptop (CIS3) can no longer print to the PC running CIS4. Worked quite happily when both running CIS3. I now notice that there are several intrusion attempts even though I have a network rule setup for the network.

I think the TCP blocked events are an attempt to print but not sure about the Skype UDP events. Either way I would have thought they would have been allowed as they are in my own network. Do I need to set a rule for each PC on the network even though they are all in a trusted zone.

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