Build 28120.2912: Windows Insider Experimental Channel, September 2026. Touchpad zoom and portrait-monitor cursor direction fixes

Fixes touchpad zoom in some apps and incorrect mouse-cursor direction on portrait monitors for Experimental Channel Insiders.

Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Experimental (26H1) channel.

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

Gradual rollout 2 items

Touchpad zoom works again in certain apps.¹
Fixes an issue that caused zoom not to work in certain apps when using a touchpad after the latest flights.
The mouse cursor moves in the correct direction on portrait monitors for some Insiders.²
Fixes an issue causing the mouse cursor to move in the wrong direction on portrait monitors for some Insiders after the latest flights.

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Version	Build	Channel
—	28120.2912	Experimental Channel

No vulnerabilities are listed for this update.

Updated Oct 26, 2026

Cited passages from Microsoft's official notes (2)

1. Fixed an issue that caused zoom not to work in certain apps when using a touchpad after the latest flights. learn.microsoft.com
2. Fixed an issue causing the mouse cursor to move in the wrong direction on portrait monitors for some Insiders after the latest flights. learn.microsoft.com

Checked automatically: 8 of 8 checks passed, 2 quoted passages

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