I was a happy PFW user for several years. A while back, I did some changes to the Hips settings, but they didn't take. Tried again. No joy. Downloaded PFW again, & re-installed. Tried again. No joy. All else worked perfectly. It coulda been me. It coulda been a PFW idiosyncracy for just the particular action I was trying to do. I decided to switch to SunFW. I just this minute checked at http://www.privacyware.com/personal_firewall.html & see that Greg Salvato has updated PFW to be okay with Win10, in addition to 8.8, Vista (yuck) & XP. So (much as I like SunFW) I shall give PFW another try in a week or so -- perhaps the glitches I encountered have faded into the gauss. Obviously, PFW is not abandonware (SunFW is abandoned, sad to say). Further, PFW is MUCH more current than SunFW. Warrants another look. THANKS constantine76 for causing me to give PFW another look-see. Aloha from Hawaii.