Hello, I have just recently purchased Kaspersky Antivirus. The version I downloaded from their site was 4.06 as I recall. I installed it and noticed a pretty big hit when some programs were starting. I went to the KAV forums on the Kaspersky site and saw a post about this and someone pointed out a link to version 4.5. I downloaded it and installed this version and everything seems to be fine now. But I wonder why if there is a newer version do they give you and old one when you buy the program? Then when I used the updater, did it not update to the new version? Or is the version 4.5 I downloaded not valid? Thanks in advance for any replies.