It's one of the unwritten laws of computing: All versions of Windows are annoying. Windows Me takes the cake, but Vista has its own unlovable annoyances, like its overzealous "Cancel or Continue?" confirmation windows so brilliantly lampooned by Apple's "I'm a Mac, I'm a PC" commercials. But that's only the tip of the Vista annoyance iceberg. Installing Vista onto an older system? There's a good chance that your graphics card, sound card, and some of your older software won't work properly. And even if you have a new system with either the Premium or Ultimate version installed, Vista won't display its nifty 3D Aero interface if your PC lacks the graphics horsepower for it. No warning screens, no error messages, no explanations--Aero simply doesn't work. That's annoying.