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Windows 10 22H2 Windows 10 22H2 Optional preview
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KB5058481

KB5058481: Cumulative update for Windows 10, version 22H2, May 2025. Calendar clock seconds return; missing GB18030 characters fixed

In short

Restores a calendar clock view with seconds and fixes specific GB18030 character rendering problems. It also has an open issue that can make CJK text look blurry at 96 DPI in Chromium-based browsers.

Does it affect you? Applies to: Devices running Windows 10, version 22H2, build 19045.5917.

Build
19045.5917
Restart
Required
Review notes Additional details from the official release notes (1) Read note
  • Does it affect you? This preview is for Windows 10, version 22H2, and installs OS build 19045.5917.

The official sources are linked at the end of the page.

Microsoft publishes separate notes for this KB for Windows 11.

What changes

Improvements 3 changes

Calendar flyout

  • Rich Calendar shows upcoming events for up to 30 days.1

Mobile Operator Profiles

Verified in package

For: Devices using mobile operator profiles

  • Country and operator settings profiles are updated.2
    Updates Country and Operator Settings Asset (COSA) profiles.

Servicing stack

  • The component that installs Windows updates receives quality improvements to help make the update process more reliable.3
    Includes servicing stack update KB5059504, build 19045.5911.

Fixes 3 changes

GDI/GDI+

2 items
  • Some GB18030-2022 characters in plane 2 render correctly.4
  • Some GB18030 characters no longer render too wide, and the sample paragraph renders correctly.5

WinSaS

  • Secondary accounts are acknowledged by Windows Account Sync Consent, preventing the issue that led to increased server load.6
    Fixes an issue in the Windows Account Sync Consent system in European Economic Area markets.

New features 2 changes

Calendar flyout

Gradual rollout 2 items
  • The calendar flyout regains a clock view that displays seconds.7
  • The Weather button in Rich Calendar has description text.8

Known issues

  1. Open Affects: Everyone

    Noto fonts

    CJK text might look blurry or unclear at 96 DPI (100% scaling) in Chromium-based browsers such as Microsoft Edge and Google Chrome. The issue is associated with limited pixel density.9

    How to apply the workaround Workaround

    Increase display scaling to improve text clarity.9

Technical details

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

Data sheet

Released
2025-05-28
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5061979, KB5061768, KB5055612, KB5053643
+13 earlier KB5052077, KB5050081, KB5046714, KB5045594, KB5043131, KB5041582, KB5040525, KB5039299, KB5037849, KB5036979, KB5035941, KB5034843, KB5034203
Replaced by
KB5063159
VersionBuildChannel
22H2 19045.5917 General availability

Security

No vulnerabilities are listed for this update.

Updated components

2,109 files changed since the previous update for the same versions.

Top changed componentsFiles
Settings33
File Explorer and shell30
Graphics and display29
Search24
Networking21
Windows Update18
Kernel12
Security and sign-in12
Secure Boot11
Printing10
Hyper-V and virtualization8
Audio7

Verified in package: changed files confirm Mobile Operator Profiles.

Sources

Updated
Cited passages from Microsoft's official notes (9)
  1. 1. Enhances the Rich Calendar feature by extending the upcoming events period to 30 days. support.microsoft.com
  2. 2. Updated: Country and Operator Settings Asset (COSA) profiles are updated. support.microsoft.com
  3. 3. SSUs improve the reliability of the update process to mitigate potential issues while installing updates. support.microsoft.com
  4. 4. Fixed: Some GB18030-2022 characters in plane 2 are not rendered. support.microsoft.com
  5. 5. Fixed: Some GB18030 characters are rendered wider. Additionally, the sample paragraph is not rendered correctly. support.microsoft.com
  6. 6. Fixed: An issue affecting the Windows Account Sync Consent system in European Economic Area markets, where secondary accounts were not acknowledged, leading to increased server load. support.microsoft.com
  7. 7. Brings back the clock view that displays seconds onto the calendar that was once removed. This feature is rolling out gradually. support.microsoft.com
  8. 8. Adds description text for the Weather button in the Rich Calendar feature. support.microsoft.com
  9. 9. Increasing the display scaling improves clarity by enhancing text rendering. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 9 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • 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 4/5, 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