Genres: Card / Board / Parlor
Release Date: April 6th, 1992
Publisher: Microsoft
Developer: Microsoft
Hearts, also known as Microsoft Hearts, and The Microsoft Hearts Network prior to Windows XP, is a computer game included with Microsoft Windows, based on a card game with the same name. It was first introduced in Windows 3.1 in 1992, and was included in every version of Windows up to Windows 7. Despite the name, the game rules correspond to those of Black Lady in which the queen of spades is a penalty card, in addition to the cards of the heart suit that are the only penalty cards in the traditional card game of Hearts. An online version named Internet Hearts was included in Windows Me and Windows XP.

Hearts was first included in Windows with Windows for Workgroups 3.11, Microsoft's first "network-ready" version of Windows, released in 1992, which included a new networking technology that Microsoft called NetDDE. Microsoft used Hearts to showcase the new NetDDE technology by enabling multiple players to play simultaneously across a computer network. This legacy could be seen in the original title bar name for the program, "The Microsoft Hearts Network" (although network play was removed in the Windows XP version).

Hearts would later be renamed Internet Hearts, and included in Windows Me and subsequent versions of Windows, but was absent in all Windows NT-based OSes prior to Windows XP including Windows NT 4.0 and Windows 2000. From the 'Help' menu, Hearts offered a quote from Shakespeare's famous play, Julius Caesar (act III, scene ii): "I come not, friends, to steal away your hearts...". Later versions of Windows starting with Vista removed this quote.

Hearts is not included with Windows 8, 10 or 11. As part of the operating system, it is deleted upon upgrading to Windows 10 from an earlier version.

On The Microsoft Hearts Network for Windows for Workgroups 3.1, the default opponent names are Anna, Lynda, and Terri. In later versions, the three default opponent names, Pauline, Michele, and Ben, were specified by the program's developer. One is the spouse of a Microsoft employee who found a program bug, one was a Microsoft employee who resigned in 1995, and one is an employee's child who frequented the Microsoft worksite. The names are not used in the Windows Vista version of the game, instead favoring the three cardinal directions that the computer players pertain to depending on their side of the window ("West", "North", and "East"). This version of the game no longer prompts for a player name to be entered at startup, and instead uses the name of the currently logged-in user account as the player name.