If you're inferring that the patches you obtained for your Windows XP install from WindowsUpdate.com are now leading to popups and spam, you are quite wrong. Its more likely that a piece of spyware/adware has been snuck into you system recently.
Get spybot, run it, get adware, run it. Switch to Firefox or Opera. Runa firewall, and get a good, up-to-date antivirus program.
Microsoft is non sending you popups/spam.