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 editions a full installation of Windows Vista through Upgrade media by bypassing the prompt to enter a license during setup, and then, once installed, reinstall the operating system over the previous installation—this essentially allows users who purchased the Upgrade version to perform a full retail installation. While the workaround is indeed possible, Microsoft has cautioned that users who perform a full installation of the operating system through this method without a genuine license for a previous version would be in violation of the Windows Vista end-user license agreement. Users can upgrade from Windows XP to Windows Vista, or upgrade from one