I also have this exact same problem. Messenger keeps signing me out about every 1-5 minutes, one moment it's worse than another. Anyway, I've had this problem ONLY after I've installed the newest versions of MSN Plus, This has been going on now for a few months in a row now and have tried every solution I could possibly find. I even had 2 friends trying to help me out, of which one is quite an expert and on top of all I even formatted my pc again and installed WLM
without MSN Plus to see if that would make a difference....and it did. I haven't been disconnected even once over the entire week and as soon as I've installed MSN Plus....the shit's been hitting the van right away again. Please dear developers....it's gotta be due to MSN Plus somehow 'cause I've never had this problem before installing the latest few versions of MSN Plus. I do have to be online in 2 several accounts for personal and business contacts....so could anyone please sort this problem or post a solution here and on other forums? Thx and good luck with it !