Hi, I have the following system setup: Vista Ultimate SP2 (newly installed OS was previously XP SP3) 2GB RAM ESS 4.0.437.0 (Home User) Module Info Virus signature database: 4132 (20090604) Update module: 1028 (20090302) Antivirus and antispyware scanner module: 1219 (20090604) Advanced heuristics module: 1092 (20090309) Archive support module: 1095 (20090525) Cleaner module: 1041 (20090603) Anti-Stealth support module: 1012 (20090526) Personal firewall module: 1040 (20080924) Antispam module: 1011 (20090114) SysInspector module: 1212 (20090414) Self-defense support module : 1005 (20081105) The problem I appear to be having is that when the Personal Firewall is enabled in any mode the PC can connect to the wireless network but cannot access the Internet. When the firewall is disabled however all is fine. I have tried disabling "Anti-Stealth" and "Self-defense" as I know this was causing issues. These have now been enabled again and the updates downloaded. Everything worked fine under XP with SP3. Is there any further investigations I can do or any help that anyone can give?