Hi i have a problem with computer if anybody could help would be great?

hi i recently opened a bad email and when i removed it with spybot it took my accessories group start menu with it and all program files for media player and other stuff. i have spent hours trying to get software to restore it. back to it original state before virus. i have tryed system restore/ anti virus software/ retore software pandora/ windows xp repair pro trial verion/ acc restore/ if i go into control panel/ folders it has a big black tick on it is that right not sure. i dont know what to do next can someone help if you know anything i can try. help would be great please.