McAfee sucks, Dr. Solomon sucks and Trend-Micro also sucks. I've tried them all and AVG and its sort of (pay) accompanying personal firewall software are fabulous.
Of course, I also use Ad-Aware, Spyware Blaster and Spy-Bot Search and Destroy. I used the free version of AVG for a year or so, but I decided to buy it and the separate personal firewall. I did that because the company has created two great products.