Windows Me build 2380.2

Windows Me build 2380.2 is the official Beta 1 release of Windows Me. In this build, the boot screen has changed from "Developer Release" to "Beta One", System Restore is added (but it is not functional) and PC Help has been remodeled around the Neptune Activity Centers, using HTML.

Neptune reference
One file, namely, with the version number 5.50.5067.1 and product name Microsoft(R) Neptune (TM) Operating System was found in this Millennium build, but it is unknown whether this Neptune build ever existed.

Some speculate it would probably be part of the Milestone 1 stage. Judging by the file dates, it would have been compiled before 20 September 1999.