I'm looking for a suitable replacement for NIS 2009 and KIS 2009 for my system. Unfortunately Norton completely corrupted my XP (multiple times) while I get random missing system32 files @ Windows start-up with Kaspersky. Maybe it's just my system, but I can't get either of those security suites work properly. I'm looking for a good FIREWALL and ANTI-VIRUS combination that is light on system resources, effective and reliable and FREE. I'm using XP (sp3). Please recommend me something that can replace Norton and Kaspersky and offers solid protection for my system. Thanks.