MS-DOS was hard to use, and required a good knowledge of the command line, so the company began working on a better graphical interface that used a mouse and on-screen icons, menus and scroll bars.
Windows was then announced in 1983 and eventually version 1.0 was launched in November 1985. Windows 2.0 came later, in December 1987, followed by Version 3.0 in May 1990. Windows 3.1 became a huge commercial success, selling 10 million copies.
In 1993, the company revealed the first 32-bit OS, Windows NT, which became a basis for later versions. Windows 95 added the Start button, taskbar and built-in Internet support for dial-up networking. In 1998, Windows 98 added USB and DVD support, and was the last version of the OS to be based off of DOS.
By 2001, the first real modern OS was unveiled, Windows XP, which would eventually become the best selling operating system of all-time. It also included a 64-bit model, a Media Center edition and Tablet PC editions. Windows Vista was a flop 5 years later, but Windows 7 revived the brand in 2009. As of today, Windows is now in version 8.1, the first version of the OS to be built for the touchscreen.