It must be confusing, updating to another release of Kav 5.0 and finding out it is running like s... I have read this too many times now and I think it's ridiculous for a product, so near launching a completely new 6.0, to spread an upgrade with so many complaints. I have tried the latest Kav 5.0.522 as well and didn't like it at all. And good for you......you like Nis2005!!!!! Glad to hear it!