Following the advice in Bob Rankin's recent column about blocking open ports, I ran ShieldsUP! and it showing 4 open ports. Using his instructions I created 4 new port blocking rules for Win 10 Firewall. After rebooting, all the new rules were showing but only 2 were working! What's up? I also found some other test result comments that are beyond my skill level. Could someone help me here? Retesting showed all 4 original ports still OPEN!