I have been trying to get the Auto Update function of Revo Uninstaller Pro to work and, after a lot of checking of firewall settings etc I finally traced the problem to Kaspersky AntiViruse (free edition) Once AV was temporarily switched off, Revo could connect successfully. What do I have to change so that I don’t have this problem in future? I believe that a similar problem also blocked ReadIris 17 but I got round that by another route.