For many years I faced this problem without solution and now I figured out whos the culprit: NOD32. In 2009 Christmas I purchased NOD32 Smart Security (the last 2 years I was using just NOD32 Antivirus) and no matter what version was installed I just keep having my PPPoE connection dropped during high traffic (e.g.: Azureus/uTorrent torrent clients, over 3 downloads in Fifefox or other heavy uses). Since I installed NOD32 Smart Security 4 I'm facing a new problem - everytime I open Microsoft Outlook 2007, even if my connection is idle (no downloads) my PPPoE connection drops and I'm unable to connect for the next 3 minutes. This happen once everytime I open Outlook 2007 in a fresh boot, the next times I open the program the connection won't drop. I changed my ADSL modem 3 times (One Siemens, One Huawei, now I'm using a D-Link) believing its was a modem hardware failure and this problem keeps hauting me. I checked my line quality (SNR/Att) and everything is running under superb conditions without variations during bandwidth usage changes. Now I can strongly believe its a NOD32 fault. Another proof that I'm may be right thats not a ADSL line or modem issues it's because I have 3 computers at home, just mine have NOD32 and when my connection drop, the other 2 PCs continues connected as if notting happened. Do somebody is facing the similar problem? I have nothing else strange installed in my computer. I just use MSN, Firefox and two torrent clients. I did not change anything in NOD32 Smart Security 4 configurations, maybe I'm missing something that I should have changed to avoid those problems? My system is running Windows XP Professional SP3 (32-bit).