Windows 7 is microsofts crowning glory, as I believe it is the best OS they have ever made. BUT! you need a rig capable of running it. Please check the minimum system requirements to run it before you choose to upgrade. It needs a lot more than vista, and when it starts up you will see why! The attention to detail is epic! And as soon as your system gets use to running it, it actually takes up less resources than vista. Congrats microsoft!