Windows Media Player 6.4

Windows Media Player 6.4 is a version of Windows Media Player released in 1999 for Windows 95, Windows NT 4.0, Windows 98 and Windows 2000. It is also present in Windows Me, Windows XP and Windows Server 2003, although it is hidden in the  folder. It was finally removed in Windows Vista build 5048.

Windows Media Player 6.4 is the last version of Windows Media Player to officially run on Windows NT 4.0; the following version, Windows Media Player 7.0 supports only Windows 95 or later.