A windows application is an application that runs on windows desktop. Windows applications will have graphical user interface (GUI).A program that is written to run under the Microsoft Windows operating system, also called a "Windows app." All 32-bit Windows applications run in the 32-bit and 64-bit versions of Windows. Any 64-bit applications (there are few by comparison) require 64-bit Windows, which is the standard on most modern desktop and laptop PCs. Older 16-bit Windows applications can run in the 32-bit versions of Windows, including Windows 95, 98, XP, Vista, 7 and 8. However, 16-bit applications do not run in the 64-bit versions of Windows .
Microsoft Windows applications are ... In the case of "Microsoft Windows", windows programs are software applications that are run on a computer that is also running Microsoft Windows as an operating system. A software application, or program, is a set of logical conditions grouped together to perform some function. Typically a Microsoft Windows application will be run within a "window" although that is not a requirement. A "window" in the context of software is an area of the screen set aside to run a single program and may or may not have options for controlling the position and size of the program area.