Windows 10 Iron

Windows 10 Iron
Version of Microsoft Windows
Windows 10 logo and wordmark.svg
20324 Enterprise Desktop.png
OS familyWindows 10 (NT 10.0)
Version
CodenameIron
Preliminary name
Architecturex86, x64, ARM64
Latest build10.0.20279.1.fe_release.201209-1322 (Dev Channel)
10.0.20324.3.fe_release.210327-1200 (Docker container images)
Release date
Support end
Server counterpart
Windows Server 2022
Replaces
Windows 10 Manganese
Replaced by
Windows 10 Cobalt

Windows 10 Iron is the 21H1 development cycle of Windows 10. It was only released as a series of Insider Preview builds between the second half of June 2020 and the first half of December of that year to the Dev Channel, although in early 2021 during the development of its server counterpart Windows Server 2022, a series of client builds were released as Docker layer images.

List of known builds[edit | edit source]

Pre-Insider Preview[edit | edit source]

Confirmed build 20124
Confirmed build 20133.1000.rs_prerelease.200519-1427
Confirmed build 20133.1000.rs_onecore_dep.200519-1740
Confirmed build 20144.1000.rsmaster.200604-1346
Confirmed build 20145.1001.rs_opt.200605-1833
Confirmed build 20148.rs_onecore_dep

Insider Preview (RS_PRERELEASE)[edit | edit source]

Leaked build 20150.1000.rs_prerelease.200612-1734
Confirmed build 20151.1000.rs_prerelease.200616-1523
Leaked build 20152.1000.rs_prerelease.200617-1502
Confirmed build 20158.1000.rs_prerelease.200624-1504
Confirmed build 20159.1000.rs_onecore_dep.200625-1700
Leaked build 20161.1000.rs_prerelease.200627-1754
Confirmed build 20167.rs_onecore_dep.200707-1700
Confirmed build 20168.rs_prerelease.200708-1420
Leaked build 20170.1000.rs_prerelease.200710-1419
Confirmed build 20170.1001
Confirmed build 20171
Confirmed build 20172.rs_prerelease.200714-1314
Leaked build 20175.1000.rs_prerelease.200717-1349
Confirmed build 20175.rs_wdatp.200717-1350
Confirmed build 20175.1001
Confirmed build 20177.rs_prerelease.200722-1439
Leaked build 20180.1000.rs_prerelease.200725-1714
Confirmed build 20181.rs_onecore.200727-1408
Leaked build 20185.1000.rs_prerelease.200731-1415
Leaked build 20190.1000.rs_prerelease.200807-1609
Confirmed build 20192.rs_onecore_ens.200811-1500
Confirmed build 20192
Confirmed build 20193
Confirmed build 20194.1000.rs_onecore_dep.200813-1700
Confirmed build 20195
Confirmed build 20196.1000.rs_prerelease.200817-1415
Leaked build 20197.1000.rs_prerelease.200818-1420
Confirmed build 20200.1000.rs_prerelease.200821-1345
Leaked build 20201.1000.rs_prerelease.200822-1922
Confirmed build 20203.rs_apps.200825-1410
Confirmed build 20203.rs_onecore_base2_hyp.200826-1700
Leaked build 20206.1000.rs_prerelease.200828-1431
Confirmed build 20207.rs_prerelease.200831-1335
Leaked build 20211.1000.rs_prerelease.200904-1619
Leaked build 20211.1005.rs_prerelease_flt.200904-1700
Leaked build 20215.1000.rs_prerelease.200911-1500
Leaked build 20221.1000.rs_prerelease.200919-1857
Confirmed build 20222.rs_prerelease.200921-1335
Confirmed build 20223.rs_onecore_dep.200922-1700
Leaked build 20226.1000.rs_prerelease.200925-1415
Confirmed build 20227.1044.rs_onecore_base2_hyp.200929-1700
Leaked build 20231.1000.rs_prerelease.201002-1444
Leaked build 20231.1005.rs_prerelease_flt.201002-1518
Confirmed build 20233.rs_prerelease.201006-1449
Confirmed build 20233.rs_onecore_base.201006-1616
Confirmed build 20235.1000.rs_prerelease.201008-1419
Leaked build 20236.1000.rs_prerelease.201009-1631
Leaked build 20236.1005.rs_prerelease_flt.201009-1648
Confirmed build 20239.1000.rs_prerelease.201014-1420
Leaked build 20241.1000.rs_prerelease.201016-1450
Leaked build 20241.1005.rs_prerelease_flt.201017-1308
Confirmed build 20241.1001.rs_prerelease.201019-2018

Insider Preview (FE_RELEASE)[edit | edit source]

Leaked build 20246.1.fe_release.201024-2009
Leaked build 20251.1.fe_release.201030-1438
Confirmed build 20256.1.fe_release.201105-1428
Leaked build 20257.1.fe_release.201106-1554
Leaked build 20262.1.fe_release.201113-1436
Leaked build 20262.1010.fe_release_svc_prod1.201113-1601
Leaked build 20270.1.fe_release.201124-1440
Leaked build 20277.1.fe_release.201207-1545
Leaked build 20279.1.fe_release.201209-1322

Docker container builds[edit | edit source]

Leaked build 20282.1.fe_release.210111-1506
Leaked build 20285.1.fe_release.210116-1100
Leaked build 20287.1.fe_release.210124-1100
Leaked build 20289.2.fe_release.210129-1837
Leaked build 20292.1.fe_release.210205-1504
Leaked build 20295.1.fe_release.210212-1600
Leaked build 20298.1.fe_release.210220-1636
Leaked build 20303.1.fe_release.210226-1630
Leaked build 20308.1.fe_release.210305-1700
Leaked build 20313.1.fe_release.210312-1606
Leaked build 20317.1.fe_release.210318-1714
Leaked build 20324.3.fe_release.210327-1200

Localization (RS_LOC)[edit | edit source]

Confirmed build 20305.1000
Confirmed build 20340.1000
Confirmed build 20344.1000
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