Desperate to differentiate itself from cable’s DVR services, TiVo kicked off its long-awaited "TiVoToGo" product, an automatic, free service upgrade for owners of "Series2" units that allows users to view content they’ve recorded at home on any laptop or PC running Microsoft "Windows XP" or "2000" operating systems. (A Mac-friendly version also is in the works.) The remote-access service won’t work for TiVo subs getting service through DirecTV, though. All files are for personal use only, and the company said it has taken steps to protect content; it will cancel a subscription or even take legal action if it finds a customer in violation of the DMCA. Shares of TiVo closed up 25 cents at $6.12.