In addition to the original Windows architecture, Microsoft also developed the Windows NT architecture for PC servers, which first appeared in Windows NT 3. 1. Windows 2000 combines the advantages of both architectures, so the code version is upgraded to 5.0.
Later, Windows XP changed its naming method, but the core architecture did not change much, so the core version number was 5. 1. Windows Vista has made great changes in both kernel and shell architecture, so the code version has entered the 6.0 era.
The naming of "Windows 7" has nothing to do with the core code version, but "7" is only because it is the seventh generation desktop operating system of Microsoft, just like Windows Me and Win98/95 belong to the same era, but the naming is fashionable. Microsoft said that Windows 7 is a major improvement of the client operating system, with great innovations in kernel, design and engineering. The core version is upgraded from 6.0 to 6. 1, which not only ensures that Windows 7 can continue the excellent features of Windows Vista, but also ensures the compatibility of applications to the greatest extent.