I actually run KIS 2011 on 2 different computers, both Win7 Pro x64 and never had any issues at all lol. The current build is 11.0.1.400 (a,b).
im running 3 computers with kaspersky internet security v 11.01.400 with windows 7 ultimate 64bit and so far not a problem on any of them 2 of them were built by me and one is a zt systems, as i said so far lol they will fix it then i will have the problems lol