Windows 7 build 6410
|Build of Windows 7|
Windows 7 build 6410 is an unleaked pre-Milestone 1 build of Windows 7. This build is referenced in build 6469's setup, saying you can only upgrade if you have Windows Vista SP1 or a build newer than 6410 of Windows codename "Windows 7". It is unknown if such a build exists. However, this build's existence might be doubtful due to build 6469's setup not having a build number in the program.