Using Windows Firewall Control I blocked my portable CCleaner v531. So far so good. However, when I hit that link button 'Check for updates' in CCleaner, it connects and checks for updates. So that link button connects to my browser and since my browser is allowed to connect to the net, it successfully launches ccleaner's site and loads it. This surprised me as I clearly remember having a similar scenario in MS Word where I had a link in my text and upon hitting the link I was given a prompt to decide whether or not to block this connection. I would expect that exact same behaviour in the case with CCleaner, but that's not the case. Is it me or sth is off here? Moreover, I uninstalled Windows Firewall Control and then went with Privatefirewall and recreated these exact same conditions for the issue. As expected, opening a link in Word gives a prompt to decide to block or allow. The 'check for update' link button in CCleaner, however, never gives any prompt but instead connects directly to my browser and loads ccleaner's site. Rather unusual. Is there a gap in my understanding or is sth off here? Any help would be appreciated. I'm just trying to learn something new here.