Best antivirus software overall Reviewers say Kaspersky Anti-Virus 7.0 is the best all-around antivirus program. It excels at its primary task of preventing viruses. Reviews agree that Kaspersky is better than the bestseller Norton AntiVirus 2008 in all aspects. Kaspersky is fast and light; it won’t slow your computer as much as the bestsellers. According to users, Kaspersky has more software conflicts and issues than the average antivirus program. Yet program users express a much higher level of satisfaction with Kaspersky antivirus software than with Norton or McAfee programs