The Update BureauBuild 26220.7670: Windows Insider Beta Channel, January 2026. Black-screen monitor and virtual desktop sign-in fixes
Build 26220.7670 for Beta Channel Insiders includes fixes for black-screen monitors, virtual desktop sign-in failures, and other issues. Five known issues remain, including problems with Start and File Explorer.
Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Beta 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
Fixes 7 changes
File Explorer
For: Beta Channel Insiders with the latest-updates toggle on
- The “Extract All” option appears in the command bar when you browse non-ZIP archive folders.1
Start menu
For: Beta Channel Insiders with the latest-updates toggle on
- For some Insiders, clicking “hide this pane” in the mobile device side panel now leads to the setting to hide it.2
Search
For: Beta Channel Insiders with the latest-updates toggle on
- The Search process shows a magnifying glass instead of an X icon.3
Settings
For: Beta Channel Insiders with the latest-updates toggle on
-
The Settings Home page might load faster.4
Underlying changes target cases where the Settings Home page loads very slowly.
Display & Graphics
For: Beta Channel Insiders with the latest-updates toggle on
- For a small number of Insiders, secondary monitors display correctly instead of showing a black screen after recent updates.5
Other
For: Beta Channel Insiders with the latest-updates toggle on
-
Sign-in failures when using Azure Virtual Desktop and Windows 365 are addressed.6
Addresses an underlying issue in the previous flight that could cause unexpected sign-in failures.
-
Some Insiders no longer encounter a SYSTEM_SERVICE_EXCEPTION crash.7
Fixes an issue that could cause a bug check with error
SYSTEM_SERVICE_EXCEPTIONafter the last few flights.
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2026-01-27
- Type
- Windows Insider build
| Version | Build | Channel |
|---|---|---|
| — | 26220.7670 | Beta Channel |
Security
No vulnerabilities are listed for this update.
Sources
Cited passages from Microsoft's official notes (7)
-
1.
Fixed an issue where the “Extract All” option would not appear in the command bar while browsing non-ZIP archive folders.
blogs.windows.com -
2.
Fixed an issue for some Insiders where clicking the “hide this pane” button in the mobile device side panel might not lead to the setting to hide it.
blogs.windows.com -
3.
Fixed an issue where the Search process was showing an icon with an X instead of a magnifying glass.
blogs.windows.com -
4.
We’ve made some underlying changes to help address cases where the Settings Home page might be very slow to load.
blogs.windows.com -
5.
Fixed an issue causing secondary monitors to not display correctly and show black screens after the latest updates for a small number of Insiders.
blogs.windows.com -
6.
Fixed an underlying issue in the previous flight which could cause unexpected sign-in failures when using Azure Virtual Desktop and Windows 365.
blogs.windows.com -
7.
Fixed an issue causing some Insiders to see a bug check with error SYSTEM_SERVICE_EXCEPTION after the last few flights.
blogs.windows.com
Checked automatically: 8 of 8 checks passed, 7 quoted passages
- 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 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