I too am am a refugee from Avira. Once I went to Avira V10, I couldn't share my printer anymore (regardless if the firewall module was installed or not). One of the WinXP Pro boxes came to a grinding halt (way too slow). I trialed and installed AIS 5 and am happy (will be happier once Avast figures out the problem with their firewall module and Perfectdisk boot-time defrag).