I've been watching my connection go in & out lately, too. I thought it was the recent ZoneAlarm Upgrade, but I've narrowed it down to LimeWire. I can watch the connections tab & see the bandwidth slowly drop to 0, occasionally as often as every 5-10 seconds. I can make it happen by refreshing a page in my browser. I recently deleted the limewire preferences folder & started over w/ a fresh Limewire, Java 142, & ZoneAlarm install, with registry cleaning & deleting Application Data folders beforehand. A few weeks ago, I thought it was a problem w/ Opera, and got rid of that, but apparently, the problem's still present, just more apparent in Opera. It tends to freeze my system, causing me to wait sometimes 5+ minutes for the task manager/explorer bar to respond. Looking around the forum I see others dealing w/ it in various incarnations, but no solution as of yet. Sorry I can't offer any more than a "me, too". I wish I could be posting a solution right now rather than looking for one.