Hello everyone! First of all, I love ESET for making such a great security program. I hadn't encountered any problem ( with both v3 and v4 ) until a few days ago, when suddenly, the firewall didn't work anymore. Here are some pictures with the error messages. Here's some information. OS info: - version of the OS and its edition: Windows Vista Home Premium ( SP1 at the moment ) - software platform: 64bit - amount of RAM installed: 4GB Product info: - product name: ESS - edition: Home - exact version number: 4.0.437 ( but the problem was definitely already there in previous builds, like 4.0.424 ) - language: English, of course. - information about installed modules: - previous or concurrently installed security software or previously installed product version: No concurrently installed security software, but before ESS, I had Norton Internet Security ( I don't remember which version though ). It's removed now. Before build 4.0.437 of ESS, I had 4.0.424 installed. When the firewall started to malfunction, I decided to try out the new build, but that didn't solve my problem. Here's a SysInspector Log: http://www.box.net/shared/q1yisnejka I have tried simply uninstalling and reinstalling, and the firewall worked at first, but after a restart, it just gave me that same error again. I have tried doing a full uninstall ( uninstalling in the Control Panel, then deleting some ESET registry entries and all folders associated with ESS ), but after a restart, it didn't work anymore. AGAIN. So I decided to turn off UAC now, and then doing a complete uninstall and then reinstall, and then restart, but that didn't work either. I then set the program in test mode, and then updated, but again, it didn't work. I restarted then, and you know what? It actually worked... - Oh wait, it didn't. -_- So, can anybody help me, please? Thanks in advance, Byvar.