popup's from messenger service

From: Malcolm (Malcolm.Griff_at_btinternet.com)
Date: 10/14/04 

Date: Thu, 14 Oct 2004 07:21:07 +0100

Hi,

I have recently re installed XP. since then I now get some annoying messages
coming up with messenger service, there are about 20+ adverts telling me to
go to different sites and purchase some software to block these.

Anyone know of how I can stop these annoying messages from popping up.

Thanks in advance.