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Archived - QuickTime for Windows: Proper Version to Install

This article contains a description of QuickTime for Windows versions and which should be installed on your computer.
This article has been archived and is no longer updated by Apple.
It is valid and feasible to have as many as three different versions of QuickTime on a Windows 95- or Windows NT-based computer.
  • QuickTime 2.1.2 16-bit
  • QuickTime 2.1.2 32-bit
  • QuickTime 3 or QuickTime 4

QuickTime 2.1.2 16-bit

Applications written to Windows 3.1 are 16 bit applications. QuickTime 2.1.2 16-bit was written for Windows 3.1. If you install an application that was written for Windows 3.1 and that application uses QuickTime, that application needs QuickTime 2.1.2 16-bit.

QuickTime 2.1.2 32-bit

Applications written for Windows 95/Windows NT generally take advantage of the 32-bit nature of Windows 95/Windows NT. QuickTime 2.1.2 32-bit was written for this environment. Applications written for the 32-bit nature of Windows 95/Windows NT that use QuickTime need QuickTime 2.1.2 32-bit.

QuickTime 3 and QuickTime 4

QuickTime 3 and QuickTime 4 contain an entirely different and new Application Programming Interface (API). Applications written for QuickTime 3 and QuickTime 4 do not work with QuickTime 2.1.2 (either 16- or 32-bit). They require QuickTime 3 or QuickTime 4 specifically. The QuickTime 3 and QuickTime 4 API for Windows 95/ Windows NT is a port of the Macintosh version of QuickTime 3 and QuickTime 4.

Example

Here is a scenario that requires all three versions of QuickTime on one computer:
  • You have an application (such as a game or other media rich application) which was written to Windows 3.1 16-bit and uses QuickTime. (You must have QuickTime 2.1.2 16-bit installed on your system.)
  • You have an application which was written as a 32-bit application using QuickTime. (QuickTime 2.1.2 32-bit must be installed on your system.)
  • You have an application written to QuickTime 3. (QuickTime 3 must be installed on your system because the QuickTime 3 based application will not recognize earlier versions of QuickTime.)
Last Modified: Feb 18, 2012
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  • Last Modified: Feb 18, 2012
  • Article: TA37350
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