Most of you are still thinking why not windows xp or why not windows 8. And why Windows 7, here is the quick answer. Because the windows XP was one of the most popular operating systems because of its simplicity and easy functionality. Similarly we assume that the windows 7 is 2nd windows XP, with enhancements in every single module of windows XP. Still fast and secure. Can be installed on any CPU with 1GB ram and support is always maximum unlike windows XP which supported only 4GB.