Complete list of Windows Insider build numbers, what happens when a build reaches its expiration date and Creators Update release date

Technical Level : Basic

Summary

The expiration dates for Windows 10 Insider builds vary by the build number. 

The table below summarizes the expiration dates for each of the builds Microsoft has released so far. 

(Per Microsoft: Dates are subject to change.).

Note: If you want information on when a build is released to the "Slow Ring" I suggest you use Twitter to "Follow": Dona Sarkar
https://twitter.com/donasarkar/status/844957996446724097
https://twitter.com/donasarkar

You can also check Wikipedia for Slow ring information: https://en.wikipedia.org/wiki/Windows_10_version_history

Released on 2/24/17, build 15042 and 15058 (3/14/17) had no expiration date! The current build 16170 expires on 5/15/2017. 

"Redstone 2" builds (14901 and later ... 15061) will officially be the Windows 10 "Creators Update"

Expected public release date Late March or early April of 2017 (expected version number = 1703)

More: http://www.tenforums.com/windows-10-news/68031-windows-10-creators-update-surface-studio.html

The most recent Insider's ISO file available is: How to create an Installation DVD or USB for Windows Insider build

Also: How to use Microsoft's Tech Bench web site to download a Windows 10 ISO file, create installation media and activate Windows 10


Details

Build               Release             Expiration            License                 Windows will

number            date                  warnings             expiration             stop booting

                                                    begin                  date                                 

9841              10/01/14             04/02/15                04/15/15                 04/30/15

9860              10/21/14             04/02/15                04/15/15                 04/30/15

9879              11/12/14             04/02/15                04/15/15                 04/30/15

9926              01/23/15             09/17/15                10/01/15                 10/15/15

10041            03/18/15             09/17/15                10/01/15                 10/15/15

10049            03/30/15             09/17/15                10/01/15                 10/15/15

10061            04/22/15             09/17/15                10/01/15                 10/15/15

10074            04/29/15             09/17/15                10/01/15                 10/15/15

10122            05/20/15             09/17/15                10/01/15                 10/15/15

10130            05/29/15             09/17/15                10/01/15                 10/15/15  

10158            06/29/15             09/17/15                10/01/15                 10/15/15

10159            06/30/15             09/17/15                10/01/15                 10/15/15

10162            07/02/15             09/17/15                10/01/15                 10/15/15

10166            07/09/15             09/17/15                10/01/15                 10/15/15

10240            07/09/15             No expiration date listed, prerelease keys will no longer activate builds.

10525            08/18/15             07/01/16                07/15/16                 07/30/16

10532            08/27/15             07/01/16                07/15/16                 07/30/16

10547            09/18/15             07/01/16                07/15/16                 07/30/16

10565            10/16/15             07/01/16                07/15/16                 07/30/16

10576            10/29/15             07/01/16                07/15/16                 07/30/16

10586            11/05/15             This build is permanently activated.

                                                  It is the Threshold 2 update (Windows version 1511)

                                                  Run  winver.exe to verify the build and version number

11082            12/16/15             07/01/16                07/15/16                 07/30/16

11099            01/13/16             07/01/16                07/15/16                 07/30/16

11102            01/21/16             07/01/16                07/15/16                 08/01/16

14251            01/27/16             07/01/16                07/15/16                 08/01/16

14257            02/03/16             07/01/16                07/15/16                 08/01/16     What's new

14267            02/18/16             07/01/16                07/15/16                 08/01/16     What's new

14271            02/24/16             07/01/16                07/15/16                 08/01/16     What's new

14279            03/04/16             07/01/16                07/15/16                 08/01/16     What's new

14291            03/17/16             07/01/16                07/15/16                 08/01/16     What's new

14295            03/25/16             07/01/16                07/15/16                 08/01/16     What's new

14316            04/06/16             07/01/16                07/15/16                 08/01/16     What's new

14328            04/22/16             07/01/16                07/15/16                 08/01/16     What's new

14332            04/26/16             07/01/16                07/15/16                 08/01/16     What's new

14342            05/10/16             07/01/16                07/15/16                 08/01/16     What's new

14352            05/26/16             07/01/16                07/15/16                 08/01/16     What's new

14361            06/08/16             07/01/16                07/15/16                 08/01/16     What's new

14367            06/16/16             09/17/16                10/01/16                 10/15/16     What's new

14371            06/22/16             09/17/16                10/01/16                 10/15/16     What's new

14372            06/23/16             09/17/16                10/01/16                 10/15/16     What's new

14376            06/28/16             See Note #1                                                              What's new

14379            06/30/16             See Note #2                                                              What's new

14383            07/07/16             See Note #3                                                              What's new

14385            07/09/16             See Note #4                                                              What's new

14388            07/12/16     slmgr /xpr returns “The machine is permanently activated”. What's new

14390            07/15/16     slmgr /xpr returns “The machine is permanently activated”. What's new

14393            07/18/16     slmgr /xpr returns “The machine is permanently activated”. What's new

=======>    08/02/16  Windows 10 Anniversary edition released  <==================

===> Build 14901 and later, code name Redstone 2 will be named "Creators Update"  <======

Build             Release           Expiration                 License                Windows will

number          date                warnings                  expiration            stop booting

                                                  begin                     date</

 
Forum Article Info

Last updated July 19, 2018 Views 18,231 Applies to:

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When the consumer preview builds expire in October (or beforehand), will there be an option to just install the newly released Windows 10 via Windows Update offering a seamless experience? 

Or will the user have to roll back or uninstall the Consumer Tech Preview first and then reinstall Windows 10 fresh?

The background: On December 5, someone asked Microsoft's Gabe Aul—he's emerged as the face of the Windows Technical Preview—whether testers would be "able to update to the RTM version [of Windows 10] when it ships? Mr. Aul responded in the affirmative: "Yes, that is our intent."

Reference: http://winsupersite.com/windows-10/windows-technical-preview-users-should-be-able-upgrade-rtm-version-windows-10

My preference would be a clean install the released version. As for the cost it could be a free or low cost upgrade for preview users if history is any judge:

http://www.zdnet.com/article/microsoft-confirms-windows-8-testers-to-get-40-upgrade-price-too/

J W Stuart: http://www.pagestart.com

Never be afraid to ask. This forum has some of the best people in the world available to help.

FWIW - My install of 10240 ( dl'd the iso from the internet and activated using instructions posted here ) shows that it expires 1/25/2016

Verify by going to command prompt ( as administrator). and enter:

c:\ slmgr / xpr

c:\ slmgr / xpr  returns a windows that says "The machine is permanently activated"

This is build 10240 with all the latest updates installed as of 7/29/15 @ 2:39PM (EDT).

Never be afraid to ask. This forum has some of the best people in the world available to help.
Did you receive your install from Microsoft as an upgrade and install from an existing qualifying Win7/8 version?  I did mine from a clean install.

No, it was an upgrade from the previous Technical Preview build.

Never be afraid to ask. This forum has some of the best people in the world available to help.
My build 10240 automatically updated to build 10532 today. For me that was a good thing, because they would always freeze at 23% done. I changed a ASmedia SATA 3 mode from AHCI to IDE and the builds "magically" completed after doing that. A clue in the Event Viewer pointed me in that direction
I applied some new Windows 10 drivers from ASROCK, my motherboards manufacturer. One of them was an update for the ASmedia SATA 3 driver. I can now set the ASmedia SATA 3 mode to AHCI and the Insider builds install fast and trouble free... I am concerned for all the "Insiders" that have no clue how to troubleshoot Windows or their PC, for that matter
To all the people who are going to be rolling back I suggest you make a set of startup disks from your manufacture. After getting the disks you should Format your hard drive, and learn the key strokes remembering Format.com /? this will open up format.com and tell you what each option you have with format. I just reformatted my hard drive and I had build 10.532 I used Format.com /q /u /c c: the q is quick I have a hugh hard drive, u is for unconditional meaning it can't be over ridden and c equals check hard drive. It's difficult to wipe a hard drive and if you don't most of the time down the road you'll lose your hard drive I have been doing this right after windows 3.1. Even with these new builds I use check disk every 2 hours of working and I have build 10547 from 3 days ago I deleted 3 files 7zip, and hp's button driver and 1 other a couple of hours ago my build hung up I ran check disk and it found 2 errors and 2 security errors but check disk fixed both. If you are going to roll back then format.

JW -

What about those who wish to continue getting Insider builds who are getting expiration notices now?  I'm seeing cases about this regularly now. 

Today I had a case where the OP whose Insider build is permanently activated after RTM but is still getting expiration notice. 

Is there something more they need to do in Settings or Window Update? 

Now with the direct activation with WIndows 7/8/8.1 Product Key in Build 10565, if they can get upgraded to that build they should be able to permanently activate according to this:   Activation FAQ for Insider Preview Build 10565 - Microsoft Community

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