After the free and valid serial for Kaspersky Internet Security 2009, many of us has uninstall the old anti virus and have try to instal the newl Kaspersky 2009. Every one that before or was running AVG8 was in front of a incompatibility problem with AVG anti-virus. Incompatibility also if the AVG8 was un-installed successfully. The problem was in the system register. What to do?