AVK definately can cause slowdowns of programs loading, this is 90% the cause of the Kaspersky engine in it, as the RAV engine is very speedy and light. You can avoid this with AVK by putting the on-access scanner on "User Defined" then entering your own extensions for things you want scanned. Doing this, you can run it on even 500mhz machines with zero slowdowns, and AVK uses less than 8,000k of ram, and almost no CPU time. But this does take some configuration!
With that being said, AVK support is *ZERO*. The US version is licensed from the German branch, who really handle everything. But buying the US version means you have to deal with the US guys, who basically are a tiny company, and offer no support whatsoever. This is why I seldom recommend AVK to people. Now if you can handle zero support, and can handle tweaking it, then there simply is no better protection available, the double-check RAV+KAV engine system, with double heuristics and double definitions is un-matched - and its only $29.00.. If you need help tweaking it, PM me and i'll run you through it, i've had a AVK license for awhile now.
With that being said, my "Shortlist" of recommended AV's is pretty short, and KAV nor AVK aren't even on it for various reasons. But I assure you, Avast is on it, and one of the biggest reasons is continued and rapid product support and development by the Avast team. That speaks VOLUMES for the people behind this product, and their commitment to it. Quality support in the AV business is extremely difficult to find. I recall recently, trying to get support for DrWeb - their website is basically down now - so I emailed them some questions/issues, and got a reply back that said "Who yuu? say self who and might help but not really"... Uhh, whats that mean?
