I've been using SS4 for a while now, and under Vista 64 was flawless. Since installing Windows 7 however, it's been awful. Some system(s) details: Windows 7 Professional vers 7600.16385 FULL INSTALL!.. not upgrade... same on both my computers. ESET SS4 version 4.0.467.0... same on both computers. Auto update has installed the latest modules. Virus signature database: 4626 (20091120) Update module: 1031 (20091029) Antivirus and antispyware scanner module: 1245 (20091116) Advanced heuristics module: 1099 (20091030) Archive support module: 1105 (20091029) Cleaner module: 1047 (20091020) Anti-Stealth support module: 1012 (20090526) Personal firewall module: 1054 (20091015) Antispam module: 1013 (20091104) SysInspector module: 1213 (20090902) Self-defense support module : 1009 (20090917) The problem is intermittent LAN connection between my two machines. It is a wired connection over a gigabit network, so it's not a wireless issue. Before anyone suggests that it's another problem, I will say that disabling ESET's firewall on both machine immediately cures the problem. Re-enabling it, immediately re-introduces the problem. When firewall is enabled on both machines, or even one of them, the other machine will occasionally drop off the network. If I try to stream 1080p for instance, it may manage to stream for 2 minutes, then it just stops. When it stops if I open my network connections, or read the contents of a shared folder, I just get the busy cursor until it either reconnects or times out. I have gone into the IDS options and ticked everything in there. I have ticked all the Windows 7 options. This was a clean install of Win 7 and so was the other machine... I did not upgrade from Vista. I also have PC Tools Spyware Doctor enabled.... but I have always run with these two programs for years without issue. Windows Firewall and Windows Defender is OFF on both machines. All network IPs are static. I have raised a ticket with no response! Please help me, or I'll just have to say bye bye to ESET.