I prefer Win-7 to all because its very simple to understand the command. smooth operate.
You can install software very easily Microsoft Windows 7 is a good product as a whole and by eliminating products which had flaws have helped decrease support costs.
The overall cost for the product is high but worth it.The user interface is really attractive. Look wise, it resembles Vista, however, performance wise, it is far better than vista. Microsoft team has put an extra effort in making the task bar more users friendly. You can even pin your favorite shortcuts in the task bar.