The thread discusses Windows build versions, explaining that each change by the development team is assigned a new build number, which can sometimes jump significantly due to team or process distinctions. The original poster is confused about the numbering system and the difference between build 7600 and previous versions. A contributor clarifies that build 7600 is the RTM (final release to manufacturing) version, not a release candidate, which was build 7100, indicating the final stage before official release. Overall, the discussion clarifies the build numbering process and the status of specific Windows versions.