XP user, I have long hesitated between Windows 7 and the latest Microsoft OS to equip the new PC I just joined (Haswell processor). On the forums, the number of negative reviews must at least match those supporting the product, some participants even up to uninstall back 7 8 .... not easy to choose in these conditions! What I decided is the announcement of the imminent arrival of a major overhaul that will improve the functionality and usability of the operating system. In use, I can say that I am very happy with my choice, the set is extremely reactive, even if it is true that it is difficult to say what percentage of the processor in this velocity. I find the ergonomics already good as it is, the integration with Office Pro cloud (7GB available anyway) is excellent. Some keyboard shortcuts to know to get started, as (CTRL + TAB), which easily gives an overview of what is installed. It will actually want to ask her fingers on the screen to complete some tasks that will come later with the possible purchase of a touchscreen. My only criticism is ultimately for the installation procedure please be aware that you can install the OS in UEFI! The DVD contains the installation "classic", it launches by default even if you have a compatible UEFI hardware, and installation in UEFI itself. No indication is issued during installation, the least we would be at the beginning of the procedure, a choice is offered, which would have at least the merit to make known this feature for people who want to go further. The installation of the UEFI mode in itself is particularly opaque, it will need to go into the BIOS and also and especially your HD or GPT partitions instead of VBR. That's what cost me a resettlement W8 ...