Operating system Chromium OS. Microsoft Windows is a family of proprietary operating systems designed by Microsoft Corporation and primarily targeted to Intel architecture based computers, with an estimated 88.9 percent total usage share on Web connected computers. The latest version is Windows 10. In 2011, Windows 7 overtook Windows XP as most common version in use. Microsoft Windows was first released in 1985, as an operating environment running on top of MS-DOS, which was the standard operating system shipped on most Intel architecture personal computers at the time. In 1995, Windows 95 was released which only used MS-DOS as a bootstrap. For
Windows Vista of the redesign of the network stack, Windows Firewall has been upgraded, with new support for filtering both incoming and outgoing traffic. Advanced packet filter rules can be created that can grant or deny communications to specific services. The 64-bit versions of Vista require that all device drivers be digitally signed, so that the creator of the driver can be identified. While much of the focus of Vista's new capabilities highlighted the new user-interface, security technologies, and improvements to the core operating system, Microsoft also adding new deployment and maintenance features: Windows Vista includes a large number of new application