We reviewed 12.0.0.191 build of Kaspersky Internet Security 2012 Beta earlier and it had a lot of issues on my configuration, thankfully newer builds are getting released fast fixing bugs reported by users. However, when you try to install a newer build on an existing installation the KIS 2012 BETA installer refuses to install the application displaying "Internal Error 2771" error, after trying things here and there I was able to install the new build.