Build list legend
Available build 
Confirmed build 
Unconfirmed build 
Fake build Existing page
Non-existent page
Non-existent page
Iron
| Version of Microsoft Windows | |
 | |
 | |
| OS family | Windows 10 (NT 10.0) |
|---|---|
| Semester | Iron |
| Architecture | x86, x64, ARM64 |
| Replaces | |
| Manganese | |
| Replaced by | |
| Cobalt | |
Iron is the 21H1 development semester of Windows as a service, the commercial release of which is Windows Server 2022. It was later followed by Cobalt in the first half of 2021.
Development on Iron started in early May 2020.
List of known builds[edit | edit source]
Available build Confirmed build Unconfirmed build Fake build This list only includes client builds of Iron. For server builds, see Windows Server 2022 § List of known builds.
Pre-Dev Channel[edit | edit source]
Dev Channel (rs_prerelease branch)[edit | edit source]
Dev Channel (fe_release branch)[edit | edit source]
Post-Dev Channel[edit | edit source]
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