The original Windows Entertainment Pack (WEP) is a collection of 16-bit casual computer games for Windows. These games were somewhat unusual for the time, in that they would not run under MS-DOS. Many of the games were later released in the Best of Microsoft Entertainment Pack. There were four Entertainment Packs in the original series. All games being 16-bit run on modern 32-bit versions of Windows but not on 64-bit Windows. Support for all versions of Microsoft Entertainment Pack ended on January 31, 2003.