How to remove auto-startup programs

Everytime I boot up my computer, the SBC Yahoo Browser loads and shows up on my taskbar.  I want to make it so that it does not autoload upon startup.  I could not find any option to make this so.  I don't see any shortcut to it at "C:\Documents and Settings\All Users\Start Menu\Programs\Startup" nor in any other corresponding user folder.

Click on start->run and enter "regedit" This will start the registry editor. Here you can search for the program name. You will probably find a registry entry in something called 'startup' and you can delete the entry.

Another way would be to download HijackThis Running this program will show you a list of programs that are started during windows startup, you can select which entries to delete. HijackThis is a lot saver to use, as it will let you save any entries you delete, so you can add them again.