If you have Xp you may notice pop ups still come thru. Even once spybot is run. This is because someone has hijacked your messenger (Not to be confused with Msn Messenger) to spam you. This messenger is normally used to send messages in house so to speak within an intranet. To disable these type of pop up. Go to control Panel then administrative tools choose/ click - Services within this pain find Messenger on the list. To the right of Messenger you will see four columns. Choose Start up type Left click the word in this column twice a properties pan pops up again look for the word Start up type click the arrow to the right of current selection a drop down list pops up choose disabled.

Again this will not disable your Msn Messenger this is a separate messenger service.

Good Luck all!