For Windows: Click the Startmenu, thenselectPrograms (orAll Programs inWindows7), open the Startup folder, and then-as Becky suggest-delete mercilessly.
Oh, and there's a second semi-related part to all this rumormongering: Think Secret reports that Apple is one of several companies fixing to buy HipSolve Media, a small startup which offers a Windows Media-based solution for record labels to distribute DRM'd music downloads directly to consumers, bypassing online shops like the iTunes Music Store.