Hmmm ???

From what you show for other apps running, and the specs on your machine (assuming there are no 'recognition' problems with your RAM), whatever is causing this is probably not part of the normal litany of troubleshooting stages...

But, there is something, perhaps minor and maybe of no import...

You said... "EVERY time I launch Limewire 3.8.7 and connect up to the network..."

Maybe I read that the wrong way, but are you possibly allowing LimeWire to launch, either with all of the other apps you name above, and/or (more importantly) before your internet connection is really stable and all of those other apps have 'cleared' their business... ?

I have seen XP go down that way with several p2p apps causing lockups after failing to connect.