It's probably the superman to Microsoft. It's horrible, yet true. With Windows Xp becoming a phenomenon over night, it's one of the most well-known Windows operating systems. Windows Xp is still being used today because many of its users want to stay with it since it is known for minimal problems and great performance. Next comes Windows Vista which was almost a complete failure. Many errors (including in official presentations) Vista was an overnight mudslide. I personally just now upgraded from Windows Vista to Windows Seven and I'm completely impressed with it considering Vista was just the worst excuse for an operating system I had ever used. I believe it will be remembered as more of a 'redeemer' other than a new version of Windows. The Bottom Line: Windows Seven= Vista-Refined to its best. The Good in 7- New features with better performance, faster startup, a more "Responsive" computer, and a "polished" theme derived from Vista. The Bad- It was really a newer look, just a cleanup of Vista's theme. Suggestions for Vista Users: Upgrade NOW you will not regret it. Suggestions for XP users: If you have a spare 200$, go for it. A great operating system.