I've been using PC-Cillin2003 and 2004 for last 18 months. 2003 version is ok. but, Pc-Cillin2004 is a horrible version I've ever seen because of following problems.1.For every single virus/program update PC is keep on rebooting. Some times goes end-less loops keep you bothering with pop-ups 'Reboot machine for updated...'2.If you are using DSL/Cable router, Firewall is USELESS3.Tech support horrible. If they could n't fix it- they just hang up!!4.Makes your computer slower and boot time increases by 2 minutes.Finally, I'm started using freeware AVG anti-virus and ZoneAlaram and life become simpler.Bottom line-- Most of the five star reviews lacks credibility. Don't get fooled my reviews.