Windows Me build 2452

Windows Me build 2452 is the official "Beta 2 refresh" build of Windows Me. It includes the new Windows 2000 color scheme. Many Control Panel applets have been updated, MSN Messenger has been updated to version 2.1, and a beta version of Movie Maker has been added, alongside Help and Support. The shutdown screen was also removed.

Neptune reference
A total of 8 files with the version number 5.50.5116.1 were found in this Millennium build, but it is unknown whether this Neptune build ever existed.

Some speculate this would've been a Milestone 2 build. It would've been compiled someday after 1999-12-11, meaning it would be one of the last Neptune builds before the Neptune project was canceled in 2000-01.