Windows Me build 2404

Windows Me build 2404 is a pre-Beta 2 build of Windows Me. It was originally leaked only as a file archive, but it was released as an ISO on an unknown date. It was uploaded on the BetaArchive FTP on 18 July 2015 by mrpijey.

The setup now plays a page-turning sound when setup advances to another screen. Alongside, it includes a new icon to "File a bug report" and includes Internet Games from MSN Zone.com.

S3 drivers
This build doesn't detect S3 drivers properly, you must upgrade from a previous build or Windows version if your computer uses a S3 graphics card, otherwise the S3 driver will only be limited to 16 colors and 640x480 resolution.

Neptune reference
Two files, namely  and , with the version number 5.50.5086.1 were found in this Millennium build, but it is unknown whether this Neptune build ever existed.

Some speculate this could be a late Milestone 1 or an early Milestone 2 build. Judging by the file dates, it would have been compiled before 26 October 1999.