I am thinking about installing Comodo3 on all of my PC's. Currently, I am only using the Windows XP Firewall. I am a little "up-tight" about installing with the Defense+. I am considering selecting the Firewall with Leak Protection. Questions: 1. If I want to enable Defense+ later, is it possible to enable it without uninstalling/reinstalling? 2. I thought that I read somewhere that you should not select the installation of the Comodo Surf Safe Toolbar. Is it recommended not to select it and why? 3. If I only have Comodo3 Firewall with Leak Protection, would a HIPS such as Threatfire work OK with Comodo3? I currently do not use ThreatFire but am thinking about adding it later. Thank you. P.S.: The reason that I am "up-tight" about installing Defense+ is that I installed Comodo3 (with Defense+) on one of my PC's shortly after Comodo3 was released from Beta. The PC slowed to a crawl and appeared to lock-up. After about 45 minutes I gave up and did a restore to last known good configuration.