You have Spamware/spyware on your pc...
Goto www.lavasoftusa.com
Download Adaware - Free
Install it, Update it, Run it... Put green checkmarks in all the boxes, custom folders, select all hard drives, next next... It will scan your system. Hit next when done, it will give you a list of junk that shouldn't be there, right click on that list and select "Select all objects", next/finish. Reboot. They will be gone
Also google.com and download their TOOLBAR.. It has a built in popup stopper.
Using ICS I'm sure you probably have XP or 2k.... So, right click your mycomputer icon and goto manage... Goto SERVICES... Find the service called MESSENGER... Stop it and then set it from automatic to disabled. This will remove the annoying Grey boxes that come up.