Previously I had trial version 551 but had the OE problem. I read that there was a fix for it in 560 so tried to get official trial version of 560 from ESET site. I installed what I thought was 560 but found that it was only 551 version.Unfortunately now the firewall element refuses to work. The error message suggests that is the result of a corrupted install so I uninstalled , rebooted and reinstalled only to find the problem repeated. Have uninstalled , cleaned registry of stray ESET bits, rebooted and re downloaded from ESET site the official ESET installer (trial) again and again the personal firewall element doesn't work. Was truly thinking about installing Smart scan but am not so sure now. Can anybody suggest 1) what the problem with the firewall element might be 2) where I can get a trial version of 560. Fully intend to buy ESS but only if I can actually get it to work.