Microsoft Windows is a graphical operating system, produced by Microsoft Corporation. The system began operating as a front-facing graphical MS-DOS in 1985, in a move to respond to growing interest in graphical user interfaces. Microsoft Windows dominates the PC market in the world, reaching a market share of almost 90% ahead of Mac OS, launched in 1984. In this essay I will talk about Windows 7, Window8 and the difference between Windows7 and Windows7. Windows 8.Windows 7 is a series introduced by Windows operating systems, Microsoft released on October 22, 2009 [4] after the Windows Vista system in less than three years. Windows 7 operating system for desktop PCs and workstations, as it is intended for Internet laptops, computers and tablets. At the same time he also released a copy of the interview to the servers (servers). It was developed after Windows 8 and Windows 7. Among the most notable features included in Windows 7 are support for ghost hard drives, handwriting awareness, and the improved ability to work with multi-core processors. Improved startup performance and improved DirecTV access in addition to improvements in the core. Additionally, support has been added for Windows 7 systems that use multiple different graphics cards. It also added a good copy of Windows System Center support and gave it added extras in windows and perched on the desktop. Windows 8 is the Microsoft Windows operating system produced by Microsoft for use on personal computers. This includes desktop computers, commercial PCs, and media centers. Windows has seen several developments in the graphical interface and functional properties of the system. Properties and developments in Windows 8 cover the work... middle of the paper... files, settings, wallpapers and more. It works as if you were on the same machine. Windows 8's high efficiency and boot speed are excellent, and this property does not exist in Windows 7. In conclusion, all Windows systems have a specific system and different features, and we use the simplest and fastest system. Evolution haunts us and we must move forward to always try the new. In my opinion I only use Windows 7 and I like it because it is easier to use and it is not complex, but I want to try to upgrade it to have a new system that wakes up well. Develop assistance to learn more and keep up with new technologies. Windows 8 is more complex but has new applications and has good security. Choose the best and complex for your personal computer to learn it step by step and we will not have problems after developing another's system.