My KIS 2009 is up for renewal soon so I thought I'd try a new security setup. Browsing these wonderful forums I decided to try Look n Stop for the firewall. Installed the trial, worked fine. Next I installed Avira Prem trial... rebooted, lost internet connection! Rebooted/reset router, cleared DNS, no joy and a network diagnosis/repair showed no problems. Uninstalled Avira, still no net connection So had to do a system restore to get back online. I uninstalled KIS 2009 beforehand, rebooted, ran ccleaner, so what's causing the problem?