So finally codename of Windows 7 has come to the picture. Microsoft announced that they are going to keep the same name for their upcoming Windows will be “Windows 7“, even its version is 6.1.

Reason being?


Windows Official Blog:

The very first release of Windows was Windows 1.0, the second was Windows 2.0, the third Windows 3.0.
Here’s where things get a little more complicated. Following Windows 3.0 was Windows NT which was code versioned as Windows 3.1. Then came Windows 95, which was code versioned as Windows 4.0. Then, Windows 98, 98 SE and Windows Millennium each shipped as 4.0.1998, 4.10.2222, and 4.90.3000, respectively. So we’re counting all 9x versions as being 4.0.
Windows 2000 code was 5.0 and then we shipped Windows XP as 5.1, even though it was a major release we didn’t’ want to change code version numbers to maximize application compatibility.
That brings us to Windows Vista, which is 6.0. So we see Windows 7 as our next logical significant release and 7th in the family of Windows releases.
We learned a lot about using 5.1 for XP and how that helped developers with version checking for API compatibility. We also had the lesson reinforced when we applied the version number in the Windows Vista code as Windows 6.0– that changing basic version numbers can cause application compatibility issues.
So we decided to ship the Windows 7 code as Windows 6.1 – which is what you will see in the actual version of the product in cmd.exe or computer properties.


4 responses to “Why Windows 7 as “Windows 7” even its version is 6.1”

  1. Author Avatar

    It is essential, Right said VJ ! Welcome mate..!

  2. Vijay Avatar

    Well eXplained. It indeed is very important for every platform to be app-friendly. This would make my job easy :-) he he..!! I am an MSI Setup Packager and an App Compat enthusiast.


  3. ArvindK Avatar

    Thanks for telling. Well It’s true about the version of Windows and I liked the way of implemeting the versions on every release of Windows. And awesome website, very informative. All knowledge at one place with ease and quality.

    1. Author Avatar

      @thanx man.

Leave a Reply

Your email address will not be published. Required fields are marked *