Every now and then I’d notice some lag every time I used MSN.  I had no idea, but after some Googling, I found the culprit.  It happened quite randomly so I couldn’t really tell why it happened.  Link to the solution below.

Link: http://www.dwforums.net/viewtopic.php?p=6939&sid=dd22386a9b66ebb189fd3cea7674b362