"messenger service" pop-ups

Go to http://grc.com/stm/ShootTheMessenger.htm and
download the program. You may also want ot go to
http://grc.com/dcom/intro.htm for the DCOMbobulator.
I spent a couple of hours today getting my father-in-law's
XP machine up and running. It was infected with both the
msblaster and the welchia viruses.
The DCOMbobulater closes the back door where some of these
viruses get in.

Joe
PLEASE DO NOT USE YOUR REAL EMAIL ADDRESS. YOU WILL GET
SPAMMED WITH THESE VIRUSES

-----Original Message-----
What's with these constant "messenger service" pop-up ads
and how do I stop them?
.