searching for security patches?

Could someone please direct me in the right direction to down load security patches for trojan and everyother or any virus that I may need patches for on my dellcomputer running windowsXP

http://v5.windowsupdate.microsoft.com/v5consumer/default.aspx?ln=en-us thats for windows update, adaware 6SE download from: http://www.majorgeeks.com/download506.html Spy Bot S&D from: http://www.safer-networking.org/en/download/index.html

Hmm, a Dell system? Start with removing the by Dell installed windows version. Than install a full version (legitimate) of windows and install ALL security patches/updates from the MS update site. Buy a router with build in hardware firewall and use that. Install a up-to-date av application. But most of all, before doing this, make sure you know how to handle a system!