Everyone could ask why buying windows 7, and what are reason to buy it.Well, i have windows 7 since one year, the most noticable change is windows user interface. Unlike windows XP, you can costumize windows seven color with aero themes. I will not talk about themes now, i will focus on better things like security, a new feature in windows 7 is User Account Control (UAC) wich prevent application from making change to your computer like virus, trojans and other malicious software without your permission. Of course you will not give the permission to a unkown program to make change to your computer. Another security thing is BitLocker drive encrytion wich it encrypt the entire drive with your password so no one can read you data without your key. More thing in windows 7 is DirectX 11 wich provide high definition graphics and fast performance for supported games. Windows 7 has windows vista features, but windows 7 is not just vista done right, it is a complete rebuilt os, no vista bugs any more. Windows 7 has a lot of built in driver, i did not inserted the computer drivers disc when i have installed windows 7. For example it include my printer driver, my vga driver and everythind else. Windows 7 is a wonderful os but not the best one :)