Windows 2.x

Windows 2.0 is the second major Windows version released, which was later updated to Windows 2.1. It was the first version to introduce support for enhanced features found in 386 processors, at the time only in the separate Windows/386 version of Windows.

New features
Windows 2.0 introduced overlapping windows for all types of windows, meanwhile Windows 1.0 supported overlapping of only dialog windows. This fired a legal conflict with Apple Inc., accusing Microsoft and Hewlett-Packard of violating copyrights Apple held on Macintosh System Software. The judge ruled in favor of Microsoft and HP in all but ten of the 189 patents Apple sued for, which according to the judge couldn't be copyrighted.

This version of Windows also introduced support for Video Graphics Array and later PS/2 mouses. It's possible to use a Windows/286 2.03 or later PS/2 mouse driver with Windows 1.0, which results in working mouse when using Windows 1.0 in newer virtualizers.

There is a myth that this version is the first to include the Control Panel, that is even appearing on Microsoft's website. In fact it was already packed with Windows 1.0 Developer Release #5, compiled over 3 years before Windows 2.0 was released.