I have had the same problem since I installed Messenger Plus 4 (Messenger Plus Live) so I did have to remove it and problems get solved.
For your info I have a cable connection of 2 mb managed by a router D-Link with 4 pcs attached and 1 wireless.
The worse thing is that the whole connection is affected.
I am here in the forum looking for a solution because I have been using MsgPlus 3 succesfully for long time.
