Windows 11 Versions and Build Numbers

Windows 11 Versions, Build Numbers, & KB Update Release Dates

Written By

Prajwal Desai

Last Updated

October 3, 2026

Posted In

This post provides a comprehensive list of all Windows 11 versions, build numbers, and KB update release dates of monthly updates released by Microsoft. The information is regularly updated with each Patch Tuesday release, ensuring you get the latest details that you’re looking for.

The Windows 11 2026 update (also known as version 26H2) is the latest version of Windows 11 released by Microsoft. It carries the build number 10.0.26300. For more information, see what’s new in the version 26H2 update for Windows 11.

Windows 11 releases monthly security updates on the second Tuesday of each month, also known as Patch Tuesday updates. These releases are cumulative, containing all previous updates to keep devices protected and productive. These updates should be installed on your PC via Windows Update. You can patch these updates via Intune or SCCM as well.

The goal of this guide is to keep you all updated with a history of all monthly security, non-security, critical and preview updates released for all the versions of Windows 11. I have put this information together with the help of Microsoft Updates documentation.

About Windows 11 Releases

According to Microsoft, Windows 11 will have an annual feature update cycle. Windows 11 feature updates will be released in the second half of the calendar year. The new updates will come with 24 months of support for the Home, Pro, Pro for Workstations, and Pro Education editions. For the Enterprise and Education editions, there will be 36 months of support offered.

So far, Microsoft has released seven significant versions of Windows 11, namely 21H2, 22H2, 23H2, 24H2, 25H2, 26H1, and 26H2. The first version of Windows 11 was released in October 2021 (Windows 11 21H2). The newest version of Windows 11 is 26H2, also referred to as the Windows 11 2026 update, which was released on September 30, 2026.

Windows 11 Update History

To make it easy for our readers, we have documented the release history of Windows 11 versions in separate tables. Each table will give you a quick view of the latest cumulative updates that are released for your Windows 11 version.

Windows 11 Version 26H2 Updates

Windows 11, version 26H2 is the annual feature update released by Microsoft for the year 2026. It is delivered as an enablement package for eligible devices running Windows 11, versions 25H2 and 24H2. The updates for this version will be delivered normally via Windows Updates.

The below table lists the build numbers of every update released for version 26H2, including the release dates and whether it’s a security/preview/OOB update. The table is updated often to include the latest updates released by Microsoft.

VersionBuild NumberKB ArticleRelease DateUpdate Type
Windows 11 26H226300.9550KB5124010September 22, 2026Preview

Windows 11 Version 26H1 Updates

Windows 11, version 26H1, is not intended as a feature update for existing devices and will not be offered through Windows Update.

The below table lists the build numbers of every update released for version 26H1, including the release dates and whether it’s a security/preview/OOB update. The table is updated often to include the latest updates released by Microsoft.

VersionBuild NumberKB ArticleRelease DateUpdate Type
Windows 11 26H128000.3086KB5124006September 22, 2026Preview
Windows 11 26H128000.2956KB5129194September 14, 2026Out-of-band
Windows 11 26H128000.2954KB5124012September 8, 2026Security
Windows 11 26H128000.2804KB5120996August 27, 2026Preview
Windows 11 26H128000.2704KB5121000August 11, 2026Security
Windows 11 26H128000.2608KB5101681July 28, 2026Preview
Windows 11 26H128000.2525KB5101649July 14, 2026Security
Windows 11 26H1 28000.2340KB5095091June 23, 2026Preview
Windows 11 26H1 28000.2269KB5095051June 9, 2026Security
Windows 11 26H1 28000.2179KB5089570May 26, 2026Preview
Windows 11 26H1 28000.2113KB5089548May 12, 2026Security
Windows 11 26H1 28000.1896KB5083806April 30, 2026Preview
Windows 11 26H1 28000.1836KB5083768April 14, 2026Security
Windows 11 26H1 28000.1764KB5079489March 26, 2026Preview
Windows 11 26H1 28000.1719KB5079466March 10, 2026Security
Windows 11 26H1 28000.1643KB5077239February 24, 2026Preview
Windows 11 26H128000.1575KB5077179February 10, 2026Security

Windows 11 Version 25H2 Updates

The below table shows the Windows 11 build numbers list for version 25H2, including the release dates of each KB update. The table is updated often to include the latest updates released by Microsoft.

VersionBuild NumberKB ArticleRelease DateUpdate Type
Windows 11 25H226200.9550KB5124010September 22, 2026Preview
Windows 11 25H226200.9457KB5129195September 14, 2026Out-of-band
Windows 11 25H226200.9445KB5124008September 8, 2026Security
Windows 11 25H226200.9278KB5120998August 27, 2026Preview
Windows 11 25H226200.9168KB5121003August 11, 2026Security
Windows 11 25H226200.8973KB5101684July 28, 2026Preview
Windows 11 25H226200.8875KB5101650July 14, 2026Security
Windows 11 25H226200.8737KB5095093June 23, 2026Preview
Windows 11 25H226200.8655KB5094126June 9, 2026Security
Windows 11 25H226200.8524KB5089573May 26, 2026Preview
Windows 11 25H226200.8457KB5089549May 12, 2026Security
Windows 11 25H226200.8328KB5083631April 30, 2026Preview
Windows 11 25H226200.8246KB5083769April 14, 2026Security
Windows 11 25H226200.8117KB5086672March 31, 2026Out-of-band
Windows 11 25H226200.8116KB5079391March 26, 2026Preview
Windows 11 25H226200.8039KB5085516March 21, 2026Out-of-band
Windows 11 25H226200.8037KB5079473March 10, 2026Security
Windows 11 25H226200.7922KB5077241February 24, 2026Preview
Windows 11 25H226200.7840KB5077181February 10, 2026Security
Windows 11 25H226200.7705KB5074105January 29, 2026Preview
Windows 11 25H226200.7628KB5078127January 24, 2026Out-of-band
Windows 11 25H226200.7627KB5077744January 17, 2026Out-of-band
Windows 11 25H226200.7623KB5074109January 13, 2026Security
Windows 11 25H226200.7462KB5072033December 9, 2025Security
Windows 11 25H226200.7309KB5070311December 1, 2025Preview
Windows 11 25H226200.7171KB5068861November 11, 2025Security
Windows 11 25H226200.7019KB5067036October 28, 2025Preview
Windows 11 25H226200.6901KB5070773October 20, 2025Out-of-band
Windows 11 25H226200.6899KB5066835October 14, 2025Security
Windows 11 25H226200.6725KB5065789September 30, 2025Preview
Windows 11 25H226200.6584Initial ReleaseSeptember 29, 2025Security

Windows 11 version 24H2 Updates

The below table shows the release history of Windows 11 updates for version 24H2, including the build numbers and release dates of the production releases. The table is updated often to include the latest updates.

VersionBuild NumberKB ArticleRelease DateUpdate Type
Windows 11 24H226100.9550KB5124010September 22, 2026Preview
Windows 11 24H226100.9457KB5129195September 14, 2026Out-of-band
Windows 11 24H226100.9445KB5124008September 8, 2026Security
Windows 11 24H226100.9278KB5120998August 27, 2026Preview
Windows 11 24H226100.9168KB5121003August 11, 2026Security
Windows 11 24H226100.8973KB5101684July 28, 2026Preview
Windows 11 24H226100.8875KB5101650July 14, 2026Security
Windows 11 24H226100.8737KB5095093June 23, 2026Preview
Windows 11 24H226100.8655KB5094126June 9, 2026Security
Windows 11 24H226100.8524KB5089573May 26, 2026Preview
Windows 11 24H226100.8457KB5089549May 12, 2026Security
Windows 11 24H226100.8328KB5083631April 30, 2026Preview
Windows 11 24H226100.8246KB5083769April 14, 2026Security
Windows 11 24H226100.8117KB5086672March 31, 2026Out-of-band
Windows 11 24H226100.8116KB5079391March 26, 2026Preview
Windows 11 24H226100.8039KB5085516March 21, 2026Out-of-band
Windows 11 24H226100.8037KB5079473March 10, 2026Security
Windows 11 24H226100.7922KB5077241February 24, 2026Preview
Windows 11 24H226100.7840KB5077181February 10, 2026Security
Windows 11 24H226100.7705KB5074105January 29, 2026Preview
Windows 11 24H226100.7628KB5078127January 24, 2026Out-of-band
Windows 11 24H226100.7627KB5077744January 17, 2026Out-of-band
Windows 11 24H226100.7623KB5074109January 13, 2026Security
Windows 11 24H226100.7462KB5072033December 9, 2025Security
Windows 11 24H226100.7309KB5070311December 1, 2025Preview
Windows 11 24H226100.7171KB5068861November 11, 2025Security
Windows 11 24H226100.7019KB5067036October 28, 2025Preview
Windows 11 24H226100.6901KB5070773October 20, 2025Out-of-band
Windows 11 24H226100.6899KB5066835October 14, 2025Security
Windows 11 24H226100.6725KB5065789September 29, 2025Preview
Windows 11 24H226100.6588KB5068221September 22, 2025Out-of-band
Windows 11 24H226100.6584KB5065426September 9, 2025Security
Windows 11 24H226100.5074KB5064081August 29, 2025Preview
Windows 11 24H226100.4946KB5063878August 12, 2025Security
Windows 11 24H226100.4770KB5062660July 22, 2025Preview
Windows 11 24H226100.4656KB5064489July 13, 2025Out-of-band
Windows 11 24H226100.4652KB5062553July 8, 2025Security
Windows 11 24H226100.4484KB5060829June 26, 2025Preview
Windows 11 24H226100.4351KB5063060June 11, 2025Out-of-band
Windows 11 24H226100.4349KB5060842June 10, 2025Security
Windows 11 24H226100.4202KB5058499May 28, 2025Preview
Windows 11 24H226100.4066KB5061977May 27, 2025Out-of-band
Windows 11 24H226100.4061KB5058411May 13, 2025Security
Windows 11 24H226100.3915KB5055627April 25, 2025Preview
Windows 11 24H226100.3775KB5055523April 8, 2025Security
Windows 11 24H226100.3624KB5053656March 27, 2025Preview
Windows 11 24H226100.3476KB5053598March 11, 2025Security
Windows 11 24H226100.3323KB5052093February 25, 2025Preview
Windows 11 24H226100.3194KB5051987February 2, 2025Security
Windows 11 24H226100.3037KB5050094January 28, 2025Preview
Windows 11 24H226100.2894KB5050009January 14, 2025Security
Windows 11 24H226100.2605KB5048667December 10, 2024Security
Windows 11 24H226100.2454KB5046740November 21, 2024Preview
Windows 11 24H226100.2314KB5046617November 12, 2024Security
Windows 11 24H226100.2161KB5044384October 24, 2024Preview
Windows 11 24H226100.2033KB5044284October 8, 2024Security
Windows 11 24H226100.1882KB5043178September 30, 2024Preview
Windows 11 24H226100.1742KB5043080September 10, 2024Security
Windows 11 24H226100.1591KB5041865August 27, 2024Preview
Windows 11 24H226100.1457KB5041571August 13, 2024Security
Windows 11 24H226100.1301KB5040529July 30, 2024Preview
Windows 11 24H226100.1150KB5040435July 9, 2024Security
Windows 11 24H226100.1000KB5039304June 28, 2024Preview
Windows 11 24H226100.863KB5039239June 15, 2024Security

Windows 11 version 23H2 Updates

The below table shows the release history of Windows 11 updates for version 23H2, including the build numbers and release dates of the production releases. The table is updated whenever a new version of Windows 11 is released.

VersionBuild NumberKB ArticleRelease Date
Windows 11 23H222621.7584KB5129242September 14, 2026
Windows 11 23H222621.7582KB5122880September 8, 2026
Windows 11 23H222631.7517KB5120240August 11, 2026
Windows 11 23H222631.7376KB5099414July 14, 2026
Windows 11 23H222631.7219KB5093998June 9, 2026
Windows 11 23H222631.7079KB5087420May 12, 2026
Windows 11 23H222631.6936KB5082052April 14, 2026
Windows 11 23H222631.6783KB5078883March 10, 2026
Windows 11 23H222631.6649KB5075941February 10, 2026
Windows 11 23H222631.6495KB5078132January 24, 2026
Windows 11 23H222631.6494KB5077797January 17, 2026
Windows 11 23H222631.6491KB5073455January 13, 2026
Windows 11 23H222631.6345KB5071417December 9, 2025
Windows 11 23H222631.6276KB5070312November 20, 2025
Windows 11 23H222631.6199KB5068865November 11, 2025
Windows 11 23H222631.6133KB5067112October 28, 2025
Windows 11 23H222631.6060KB5066793October 14, 2025
Windows 11 23H222631.5984KB5065790September 23, 2025
Windows 11 23H222631.5909KB5065431September 9, 2025
Windows 11 23H222631.5840KB5064080August 26, 2025
Windows 11 23H222631.5771KB5066189August 19, 2025
Windows 11 23H222631.5768KB5063875August 12, 2025
Windows 11 23H222631.5699KB5062663July 22, 2025
Windows 11 23H222631.5624KB5062552July 8, 2025
Windows 11 23H222631.5549KB5060826June 26, 2025
Windows 11 23H222631.5472KB5060999June 10, 2025
Windows 11 23H222631.5415KB5062170May 31, 2025
Windows 11 23H222631.5413KB5058502May 27, 2025
Windows 11 23H222631.5335KB5058405May 13, 2025
Windows 11 23H222631.5262KB5055629April 22, 2025
Windows 11 23H222631.5192KB5058919April 11, 2025
Windows 11 23H222631.5189KB5055528April 8, 2025
Windows 11 23H222631.5126KB5053657March 25, 2025
Windows 11 23H222631.5039KB5053602March 11, 2025
Windows 11 23H222631.4974KB5052094February 25, 2025
Windows 11 23H222631.4890KB5051989February 11, 2025
Windows 11 23H222631.4830KB5050092January 29, 2025
Windows 11 23H222631.4751KB5050021January 14, 2025
Windows 11 23H222631.4602KB5048685December 10, 2024
Windows 11 23H222631.4541KB5046732November 21, 2024
Windows 11 23H222631.4460KB5046633November 12, 2024
Windows 11 23H222631.4391KB5044380October 22, 2024
Windows 11 23H222631.4317KB5044285October 8, 2024
Windows 11 23H222631.4249KB5043145September 26, 2024
Windows 11 23H222631.4169KB5043076September 10, 2024
Windows 11 23H222631.4112KB5041587August 27, 2024
Windows 11 23H222631.4037KB5041585August 13, 2024
Windows 11 23H222631.3958KB50405272024-07-25
Windows 11 23H222631.3880KB50404422024-07-09
Windows 11 23H222631.3810KB50393022024-06-25
Windows 11 23H222631.3737KB50392122024-06-11
Windows 11 23H222631.3672KB50378532024-05-29
Windows 11 23H222631.3593KB50377712024-05-14
Windows 11 23H222631.3527KB50369802024-04-23
Windows 11 23H222631.3447KB50368932024-04-09
Windows 11 23H222631.3374KB50359422024-03-26
Windows 11 23H222631.3296KB50358532024-03-12
Windows 11 23H222631.3235KB50348482024-02-29
Windows 11 23H222631.3155KB50347652024-02-13
Windows 11 23H222631.3085KB50342042024-01-23
Windows 11 23H222631.3007KB50341232024-01-09
Windows 11 23H222631.2861KB50333752023-12-12
Windows 11 23H222631.2792KB50322882023-12-04
Windows 11 23H222631.2715KB50321902023-11-14
Windows 11 23H222631.2506KB50314552023-10-31
Windows 11 23H222631.2428NA2023-10-31
Windows 11 23H2 Version with build numbers

Windows 11 version 22H2 Updates End of Servicing Reached

As of October 14, 2025, all editions of Windows 11, version 22H2, have reached the end of servicing.

Here is a table that shows the release history of Windows 11 updates for version 22H2, including the build numbers and release dates of the production releases. The table is updated whenever a new version of Windows 11 is released.

Version 22H2Build NumberKB ArticleRelease Date
Windows 11 22H222621.6060KB5066793October 14, 2025
Windows 11 22H222621.5984KB5065790September 23, 2025
Windows 11 22H222621.5909KB5065431September 9, 2025
Windows 11 22H222621.5771KB5066189August 19, 2025
Windows 11 22H222621.5768KB5063875August 12, 2025
Windows 11 22H222621.5699KB5062663July 22, 2025
Windows 11 22H222621.5624KB5060826July 8, 2025
Windows 11 22H222621.5549KB5060826June 26, 2025
Windows 11 22H222621.5472KB50609992025-06-10
Windows 11 22H222621.5415KB50621702025-05-31
Windows 11 22H222621.5413KB50585022025-05-27
Windows 11 22H222621.5335KB50584052025-05-13
Windows 11 22H222621.5262KB50556292025-04-22
Windows 11 22H222621.5192KB50589192025-04-11
Windows 11 22H222621.5189KB50555282025-03-08
Windows 11 22H222621.5126KB50536572025-03-25
Windows 11 22H222621.5039KB50536022025-03-11
Windows 11 22H222621.4974KB50520942025-02-25
Windows 11 22H222621.4890KB50519892025-02-11
Windows 11 22H222621.4830KB50500922025-01-29
Windows 11 22H222621.4751KB50500212025-01-14
Windows 11 22H222621.4602KB50486852024-12-10
Windows 11 22H222621.4541KB50467322024-11-21
Windows 11 22H222621.4460KB50466332024-11-12
Windows 11 22H222621.4391KB50443802024-10-22
Windows 11 22H222621.4317KB50442852024-10-08
Windows 11 22H222621.4249KB50431452024-09-26
Windows 11 22H222621.4460KB50430762024-09-10
Windows 11 22H222621.4112KB50415872024-08-27
Windows 11 22H222621.4037KB50415852024-08-13
Windows 11 22H222621.3958KB50405272024-07-25
Windows 11 22H222621.3880KB50404422024-07-09
Windows 11 22H222621.3810KB50393022024-06-25
Windows 11 22H222621.3737KB50392122024-06-11
Windows 11 22H222621.3672KB50378532024-05-29
Windows 11 22H222621.3593KB50377712024-05-14
Windows 11 22H222621.3527KB50369802024-04-23
Windows 11 22H222621.3447KB50368932024-04-09
Windows 11 22H222621.3374KB50359422024-03-26
Windows 11 22H222621.3296KB50358532024-03-12
Windows 11 22H222621.3235KB50348482024-02-29
Windows 11 22H222621.3155KB50347652024-02-13
Windows 11 22H222621.3085KB50342042024-01-23
Windows 11 22H222621.3007KB50341232024-01-09
Windows 11 22H222621.2861KB50333752023-12-12
Windows 11 22H222621.2792KB50322882023-12-04
Windows 11 22H222621.2715KB50321902023-11-14
Windows 11 22H222621.2506KB50314552023-10-26
Windows 11 22H222621.2428KB50313542023-10-10
Windows 11 22H222621.2361KB50303102023-09-26
Windows 11 22H222621.2283KB50302192023-09-12
Windows 11 22H222621.2215KB50293512023-08-22
Windows 11 22H222621.2134KB50292632023-08-08
Windows 11 22H222621.1992KB50281852023-07-11
Windows 11 22H222621.1848KB50272312023-06-13
Windows 11 22H2KB5026372KB50263722023-05-09
Windows 11 22H222621.1555KB50252392023-04-11
Windows 11 22H222621.1413KB50237062023-03-14
Windows 11 22H222621.1265KB50228452023-02-14
Windows 11 22H222621.1105KB50223032023-01-10
Windows 11 22H222621.963KB50212552022-12-13
Windows 11 22H222621.819KB50199802022-11-08
Windows 11 22H222621.755KB50184962022-10-25
Windows 11 22H222621.675KB50195092022-10-18
Windows 11 22H222621.674KB50184272022-10-11
Windows 11 22H222621.608KB50173892022-09-30
Windows 11 22H222621.525KB50193112022-09-27
Windows 11 22H222621.521NA2022-09-20
Windows 11 22H2 Version with build numbers

Windows 11 version 21H2 End of Servicing Reached

As of October 10, 2023, all editions of Windows 11, version 21H2, have reached the end of servicing.

Here is a table that shows the release history of Windows 11, version 21H2, including the build numbers and release dates of the production releases. The table is updated whenever a new version of Windows 11 is released.

Version 21H2Build NumberKB ArticleRelease Date
Windows 11 21H222000.3260KB50442802024-10-08
Windows 11 21H222000.3197KB50430672024-09-10
Windows 11 21H222000.3147KB50415922024-08-13
Windows 11 21H222000.3079KB50404312024-07-09
Windows 11 21H222000.3019KB50392132024-06-11
Windows 11 21H222000.2960KB50377702024-05-14
Windows 11 21H222000.2899KB50368942024-04-09
Windows 11 21H222000.2836KB50358542024-03-12
Windows 11 21H222000.2777KB50347662024-02-13
Windows 11 21H222000.2713KB50341212024-01-09
Windows 11 21H222000.2652KB50333692023-12-12
Windows 11 21H222000.2600KB50321922023-11-14
Windows 11 21H222000.2538KB50313582023-10-10
Windows 11 21H222000.2482KB50303012023-09-26
Windows 11 21H222000.2416KB50302172023-09-12
Windows 11 21H222000.2360KB50293322023-08-22
Windows 11 21H222000.2295KB50292532023-08-08
Windows 11 21H222000.2245KB50282452023-07-25
Windows 11 21H222000.2176KB50281822023-07-11
Windows 11 21H222000.2124KB50272922023-06-28
Windows 11 21H222000.2057KB50272232023-06-13
Windows 11 21H222000.2003KB50264362023-05-23
Windows 11 21H222000.1936KB50263682023-05-09
Windows 11 21H222000.1880KB50252982023-04-25
Windows 11 21H222000.1817KB50252242023-04-11
Windows 11 21H222000.1761KB50237742023-03-28
Windows 11 21H222000.1696KB50236982023-03-14
Windows 11 21H222000.1641KB50229052023-02-21
Windows 11 21H222000.1574KB50228362023-02-14
Windows 11 21H222000.1516KB50192742023-01-19
Windows 11 21H222000.1455KB50222872023-01-10
Windows 11 21H222000.1335KB50212342022-12-13
Windows 11 21H222000.1281KB50191572022-11-15
Windows 11 21H222000.1219KB50199612022-11-08
Windows 11 21H222000.1165KB50184832022-10-25
Windows 11 21H222000.1100KB50203872022-10-17
Windows 11 21H222000.1098KB50184182022-10-11
Windows 11 21H222000.1042KB50173832022-09-20
Windows 11 21H222000.978KB50173282022-09-13
Windows 11 21H222000.918KB50166912022-08-25
Windows 11 21H222000.856KB50166292022-08-09
Windows 11 21H222000.832KB50158822022-07-21
Windows 11 21H222000.795KB50158142022-07-12
Windows 11 21H222000.778KB50146682022-06-23
Windows 11 21H222000.740KB50161382022-06-20
Windows 11 21H222000.739KB50146972022-06-14
Windows 11 21H222000.708KB50140192022-05-24
Windows 11 21H222000.675KB50139432022-05-10
Windows 11 21H222000.652KB50126432022-04-25
Windows 11 21H222000.613KB50125922022-04-12
Windows 11 21H222000.593KB50115632022-03-28
Windows 11 21H222000.556KB50114932022-03-08
Windows 11 21H222000.527KB50104142022-02-15
Windows 11 21H222000.493KB50103862022-02-08
Windows 11 21H222000.469KB50083532022-01-25
Windows 11 21H222000.438KB50107952022-01-17
Windows 11 21H222000.434KB50095662022-01-11
Windows 11 21H222000.376KB50082152021-12-14
Windows 11 21H222000.348KB50072622021-11-22
Windows 11 21H222000.318KB50072152021-11-09
Windows 11 21H222000.282KB50067462021-10-21
Windows 11 21H222000.258KB50066742021-10-12
Windows 11 21H222000.1942021-10-04
Windows 11 21H2 Version with build numbers

Windows 11 Versions vs. Build Numbers

In Windows 11, the version number identifies the major feature release, such as 26H2, 25H2, or 24H2, and is mainly used to show which broad generation of Windows 11 you are running. Whereas the build number identifies the exact technical OS build installed, such as 26300, 26200, 22621, 22631 etc, often with an additional revision like 22631.4037 to indicate cumulative updates and fixes. In short, the version number tells you the release level, whereas the build number tells you the precise system build and update state.

Listed below are all the Windows 11 versions with their respective build numbers released by Microsoft.

  • Windows 11 version 26H2 (original release): The OS build number is 26300.
  • Windows 11 version 26H1 (original release): The OS build number is 28000.
  • Windows 11 version 25H2 (original release): The OS build number is 26200.
  • Windows 11 version 24H2 (original release): The OS build number is 26100.
  • Windows 11 version 23H2 (original release): The OS build number is 22631.
  • Windows 11 version 22H2 (original release): The OS build number is 22621.
  • Windows 11 version 21H2 (original release): The OS build number is 22000.

Checking the Build Number and Version of your Windows 11

There are many ways to find the version and build number of the Windows 11, and let me provide you the quickest way to get that. Right-click on Start and select Run. In the Run box, type “winver” and press enter. This will bring up the About Windows pop-up, and here you can see the version and OS build of Windows 11.

For example, in the below screenshot, “About Windows” shows the Windows 11 version as 21H2 and OS build 22000.978. Click OK to close the window.

Windows 11 Versions Build Numbers
Windows 11 Versions | Windows 11 Build Numbers – About Windows 11

Useful Read: Download Windows 11 Administrative Templates

Windows 11 Major Minor Build Rev Details

If you notice the Windows 11 build number, it is represented in a particular format. In this section, we will understand the Windows 11 major, minor, build, and rev in a bit more detail. Let’s pick Windows 11 23H2 as an example.

The build number of the Windows 11 23H2 original release is 10.0.26300.9550. The below table explains what a build number is composed of and the version details.

NameBuild Details
Major10
Minor0
Build9550
Rev9550
Windows 11 Versions and Windows 11 Build Numbers Explained

Note: For every new major version of Windows 11 released, the build number is incremented. This build number remains the same for that version; however, only the Rev value changes as the new updates are released for that Windows 11 version. This means for Windows 11 26H2, the build number will remain the same, which is “26300” whereas the Rev value is incremented with every update.

Windows 11 Servicing Timeline and Lifecycle

New versions of Windows 11 will be released once per year and will receive monthly quality updates that include security and non-security updates. To continue receiving support from Microsoft, users should always install the most recent version before the current version’s end of servicing.

Windows 11 Enterprise, Education, and IoT Enterprise editions will have a servicing timeline of 36 months from the release date. Whereas Windows 11 Pro, Home, and Pro Education will have a servicing timeline of 24 months from the actual release date.

Servicing Timeline for Windows 11, 26H2

The servicing timeline for Windows 11 version 26H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 26H2 Enterprise, Education, IoT Enterprise, and Enterprise multi-session36 months from the release dateSeptember 29, 2026October 9, 2029
Windows 11 26H2 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateSeptember 29, 2026October 10, 2028

Servicing Timeline for Windows 11, 26H1

The servicing timeline for Windows 11 version 26H1 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 26H1 Enterprise, Education, IoT Enterprise, and Enterprise multi-session36 months from the release dateFebruary 02, 2026March 13, 2029
Windows 11 26H1 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateFebruary 02, 2026March 14, 2028

Servicing Timeline for Windows 11, 25H2

The servicing timeline for Windows 11 version 25H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 25H2 Enterprise, Education, IoT Enterprise, and Enterprise multi-session36 months from the release dateSeptember 30, 2025October 10, 2028
Windows 11 25H2 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateSeptember 30, 2025October 12, 2027

Servicing Timeline for Windows 11, 24H2

The servicing timeline for Windows 11 version 24H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 24H2 Enterprise, Education, IoT Enterprise36 months from the release dateOctober 1, 2024October 12, 2027
Windows 11 24H2 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateOctober 1, 2024October 13, 2026

Servicing Timeline for Windows 11, 23H2

The servicing timeline for Windows 11 version 23H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 23H2 Enterprise, Education, IoT Enterprise36 months from the release dateOctober 31, 2023November 10, 2026
Windows 11 23H2 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateOctober 31, 2023November 11, 2022 (End of Updates)
Windows 11 23H2 Servicing Timeline

Servicing Timeline for Windows 11, 22H2

The servicing timeline for Windows 11 version 22H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 22H2 Enterprise, Education, IoT Enterprise36 months from the release dateSep 20, 2022Oct 14, 2025 (End of Updates)
Windows 11 22H2 Home, Pro, Pro Education, Pro for Workstations24 months from the release dateSep 20, 2022Oct 8, 2024 (End of Updates)
Windows 11 22H2 Servicing Timeline

Servicing Timeline for Windows 11, 21H2

The servicing timeline for Windows 11 version 21H2 is detailed below, along with the start and end dates for support.

Version and EditionServicing TimelineDate AvailableEnd of Servicing
Windows 11 21H2 Enterprise, Education, IoT Enterprise36 months from release dateOct 4, 2021Oct 8, 2024 (End of Updates)
Windows 11 21H2 Home, Pro, Pro Education, Pro for Workstations24 months from release dateOct 4, 2021Oct 10, 2023 (End of Updates)
Windows 11 21H2 Servicing Timeline

Known Issues

Depending on whether you use Windows 11 version 26H1, 25H2, 24H2, or 23H2, the below links can be used to track the status of the known issues and solutions offered by Microsoft.

Resolved Issues

To see a list of issues that were resolved by Microsoft in versions 26H1, 25H2, 24H2, 23H2, use the below links.

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8 Comments

  1. The tables on this page I noticed that they are up to date. Are they updated manually or via query? if automatically, from which source? I would like to replicate the same in an excel table

    Reply

  2. Is there a roadmap for a Windows 12?

    Reply

    1. The release date for Windows 12 remains uncertain, while the 25H2 update is expected to launch soon.

      Reply

  3. We see a version 10.0.26100.4851 on some of our managed devices, if you’d like to add that in to your list.

    Reply
  4. Avatar photo David Suycott says:

    greetings! will all future windows 11 builds start with “22”? 22xxxxxx.xx etc.

    thanks for all your articles! i’ve learned and solved many things because of your work.

    Reply

Prajwal Desai

Prajwal Desai is a highly accomplished technology expert and a 14-time Dual Microsoft MVP (Most Valuable Professional), specializing in Microsoft Intune, SCCM, Windows 365, Enterprise Mobility, and Windows. As a renowned author, speaker, and community leader, he is widely recognized for sharing his in-depth expertise and insights through his blog, YouTube channel, conferences, webinars, and other platforms.