I finally got fed up with Norton AV. LiveUpdate killed my system once, customer support could not be worse, and the program just is not coded very efficiently. So I finally cut my ties after having remained loyal since 2002. Due to First Defense and the ease at which it allows for system restorations, I tried all of what I consider to be the major AVs. Here are my official, unofficial, and unscientific results: KAV & KIS: Could not complete a system scan on my system. It would hand around 8-11% despite having an expert walk me through the installation process and trying to install multiple times. NOD32: Was better than KAV & KIS from the standpoint that it installed on my system and completed a full system scan; however, it would not scan what it called "password protected" files among which were Lavasoft's Ad-Aware files. These were only a portion of the files that it refused to scan. My thinking may be wrong here and I'm sure that many loyal NOD32 users will chime in to defend this popular software; however, if a legitimate program can hide from NOD32 this way, then can't a virus do the same? F-Secure: I was going to give this one a fair shot at becoming my Norton replacement despite its price, but the person that recommended the software, bigc73542, whom I respect very much apparantly abandoned it as evidenced here: Normally, I would not let one person's actions shape my opinion in this manner, no matter how much I respect him/her. However, in this case I coupled it with a report that claimed that F-Secure flagged more false positives than any other AV tested. I cannot have a trigger happy AV. McAfee: I did not give this AV a chance. I read a recent article that discussed the system administrator nightmare McAfee's AV caused by wrongly identifying Windows system files as a virus and taking "appropriate action" and deleting them. As a result of this mishap, it will be a long time before I give McAfee a shot at being on any of my systems. BitDefender: This software is the leading candidate at replacing Norton on my system. Very frequent updates, fairly clean interface, rates highly by almost every reputable magazine/tester. So far, so good.