Build 28020.2207

Windows Insider Experimental Channel, May 2026

Includes a small number of minor bug fixes and improvements, but the notes do not identify them.

Does it affect you? Applies to: Insiders in the Experimental (26H1) Channel. Insiders formerly in the Canary 28000 series Channel may not yet have transitioned to the new channel name.

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

Fix 1 change

General

Gradual rollout

For: Insiders in the Experimental (26H1) Channel

A small number of minor bugs are fixed, but the notes do not specify which ones.¹

Improvement 1 change

General

Gradual rollout

For: Insiders in the Experimental (26H1) Channel

A small number of minor improvements are included, but the notes do not describe them.¹

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released: 2026-05-29
Type: Windows Insider build

Version	Build	Channel
—	28020.2207	Experimental Channel

Security

No vulnerabilities are listed for this update.

Sources

Windows Insider release notes

Updated Oct 26, 2026

Cited passages from Microsoft's official notes (1)

1. This update includes a small number of minor bug fixes and improvements. learn.microsoft.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 5/5, completeness 5/5. 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