A class-action suit against Microsoft’s “Vista Capable” stickers is scheduled to go to trial in October. Microsoft decided to lower the bar on what would be considered a Windows Vista capable computer, and so if you bought a computer that had one of these stickers on it you would basically have a computer that wouldn’t really run Windows Vista in a compelling manner.
Additionally, during Windows Vista’s launch, many drivers were missing. Even drivers for things like top-of-the-line-best-selling printers, not to mention hardware that is not so mainstream. Even today Windows Vista lacks many drivers. NY Times brings the story of three people who should have known better but upgraded to Windows Vista and instantly became disappointment (free registration required).