Windows 8 Release Date And Build Numbers

Windows 8 Consumer Preview (beta) is already out and can be downloaded and installed free of cost. The build number of Windows 8 Consumer Preview which was released yesterday is 8250. The full exact build that was released is 6.2.8250.0.winmain_win8beta.120217-1520. There will be a lot of work to be done on the Pre-release version of Windows 8 and hence there are many builds that are planned ahead of time.

Windows 8 Pre-Release Candidate Build tags

Let’s first go through the build string that will be released as Windows 8 Pre-Release candidate:


It is not necessary that all these will be released to the public. The public release will most probably be the final one 6.2.8288.0.winmain.120223-1751.

Windows 8 release dates and roadmap

The list below shows all the release dates for different versions of Windows 8. We are already at Consumer Preview (February 28, 2012) which was exactly on time. So we can expect Windows 8 final to be released at the end of 2012.

  • Milestone 1
  • Milestone 2 – December 9, 2010
  • Milestone 3 – February 28, 2011
  • Developer Preview – BUILD – September 13, 2011
  • Consumer Preview – February 29, 2012
  • Release Candidate – MIX12 – July 9, 2012
  • Ready to Manufacturing – at the end of 2012
  • Retail – January 7, 2013

How to read Windows 8 build tags

The Windows 8 build tags contain a lot of information about the Operating System. Let’s read the Consumer Preview build step by step:

The build number: 6.2.8250.0.winmain_win8beta.120217-1520

  1. 6.2 –> Kernel version
  2. 8250 –> Major build number
  3. 0 –> Revision number
  4. winmain_win8beta –> Windows branch
  5. 120217-1520 –> Build date in the format year month day – hours minutes

I hope now you can understand how these build strings are built. [Via]