A crappy operating system for your computer that slows even the fastest machines, attracts a heck lot of viruses and costs more than the earth. It comes with Windows Activation, that treats honest buyers as criminals. It also has been trying to copy Mac OS X (and failing miserably).
Bill : Hi. I just installed windows vista on my pc and now it won't work beacuse I failed activation.
Steve : I know. Even Windows 95 was better. I still use XP. Kill activation!