The Update BureauBuild 29531.1000: Windows Insider Experimental Channel, February 2026. An optional move to a new platform development path
Canary Insiders can opt into build 29531.1000 and a new platform-development path. Some current features may be temporarily unavailable, and returning to 28000-series builds requires a clean installation.
Does it affect you? Applies to: Windows Insiders in the Experimental Channel, identified as the Canary Channel in Microsoft's release notes. The build is offered as an optional update.
This is a test build for people in the Windows Insider Program. Features in it can change, be removed, or never reach regular Windows releases.
What changes
Improvement 1 change
Platform development path
For: Insiders who opt into the update
- This build moves your device to a new active development path.1
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2026-02-18
- Type
- Windows Insider build
| Version | Build | Channel |
|---|---|---|
| — | 29531.1000 | Experimental Channel |
Security
No vulnerabilities are listed for this update.
Sources
Cited passages from Microsoft's official notes (1)
-
1.
This update includes platform changes in moving to a new active development build.
blogs.windows.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage
- Quotes found in the official pages: passed
- Numbers found in the sources: passed
- Vulnerabilities from the dossier only: passed
- Links to allowed domains only: passed
- Every official change covered: passed
- Readable plain text: passed
- Changes confirmed by the file list: passed
- Sources agree: passed
A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 4/5. How we work
Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake