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Windows 11 23H2 Windows 11 23H2 Optional preview
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KB5062663

KB5062663: Cumulative update for Windows 11, version 23H2, July 2025. ReFS backup exhaustion and input method problems addressed

In short

Addresses problems with ReFS backups, Chinese and phonetic input, device responsiveness, and accessibility icons. It also warns that Secure Boot certificate expiration could affect certain devices if certificates are not updated in time.

Does it affect you? Applies to: Devices running Windows 11, version 23H2. The KB lists build 22631.5699.

Build
22631.5699
Restart
Required
Review notes Additional details from the official release notes (1) Read note
  • What changes This update is for Windows 11 version 23H2. The individual fixes apply in the situations described in their text, such as using ReFS backups or a particular input method.

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

What changes

Fixes 8 changes

Country and Operator Settings Asset (COSA)

Verified in package
  • Profiles for certain mobile operators are brought up to date.1

File systems

2 items
  • Addresses cases where backing up large files on ReFS could exhaust system memory.2
    The issue could occur occasionally when backup applications handled large files on the Resilient File System (ReFS).
  • Searching for PDFs in a shared folder no longer produces certain incorrect error messages that can disrupt printing or backups.3
    The reported errors include “No More Files” and “STATUS_NO_MORE_FILES”; they affected output to the virtual PDF printer and backup processes.

Input (known issue)

2 items
  • Addresses problems with Traditional Chinese input using Microsoft Changjie IME, including unresponsive keys, incorrect word output, and a broken candidate window.4
    The problems might occur after installing KB5062552.
  • Addresses problems with Hindi and Marathi phonetic input methods that might occur after KB5062552.5
    The affected methods include the Hindi Phonetic Input keyboard and the Marathi Phonetic keyboard.

Networking

Verified in package
  • Addresses delayed response from peripheral devices after waking from hibernation on some devices with active cellular connections.6

Stability issue

  • Addresses rare cases where devices become unresponsive in specific scenarios after installing the May 2025 security update and later updates.7

Taskbar

  • Addresses an issue that caused taskbar icons for accessibility features not to appear.8

Improvements 2 changes

Printer

  • Printer names are easier to identify during printer setup with IPP Directed Discovery.9
    Printer names appear more clearly when using IPP Directed Discovery.

Servicing stack

  • The component that installs Windows updates receives quality improvements.10
    The update includes servicing stack update KB5062686, builds 22621.5690 and 22631.5690.

Technical details

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

Data sheet

Released
2025-07-22
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5062552, KB5060826, KB5060999, KB5062170
+34 earlier KB5058502, KB5058405, KB5055629, KB5058919, KB5055528, KB5053657, KB5053602, KB5052094, KB5051989, KB5050092, KB5050021, KB5048685, KB5046732, KB5046633, KB5044380, KB5044285, KB5043145, KB5043076, KB5041587, KB5041585, KB5040527, KB5040442, KB5039302, KB5039212, KB5037853, KB5037771, KB5036980, KB5036893, KB5035942, KB5035853, KB5034848, KB5034765, KB5034204, KB5034123
Replaced by
KB5063875
VersionBuildChannel
23H2 22631.5699 General availability
23H2 22631.5699 Release Preview Channel
24H2 26100.4767 Release Preview Channel

Security

No vulnerabilities are listed for this update.

Updated components

1,310 files changed since the previous update for the same versions.

Top changed componentsFiles
Settings137
Graphics and display31
File Explorer and shell18
Networking17
Hyper-V and virtualization14
Security and sign-in14
Storage and file systems13
Kernel9
Emoji and input8
Bluetooth6
Remote Desktop6
Secure Boot5

Verified in package: changed files confirm Country and Operator Settings Asset (COSA), Networking.

Sources

Updated
Cited passages from Microsoft's official notes (10)
  1. 1. [Country and Operator Settings Asset (COSA)] Fixed: This update brings profiles up to date for certain mobile operators. support.microsoft.com
  2. 2. Fixed: This update addresses an issue in the Resilient File System (ReFS) where using backup applications on large files could occasionally result in system memory becoming fully exhausted. support.microsoft.com
  3. 3. Fixed: An issue where searching for PDF files in a shared folder could return incorrect error messages—such as “No More Files” or “STATUS_NO_MORE_FILES.” support.microsoft.com
  4. 4. Fixed: An issue when using the Microsoft Changjie IME (input method editor) for Traditional Chinese might cause problems such as not being able to form or select words, unresponsive spacebar or blank key, incorrect word output, or a broken candidate window display. support.microsoft.com
  5. 5. Fixed: This update addresses an issue that affects Phonetic input methods, including the Hindi Phonetic Input keyboard and the Marathi Phonetic keyboard, which might not work correctly after installing KB5062552. support.microsoft.com
  6. 6. [Networking] Fixed: An issue where peripheral devices could take longer to work after resuming from hibernation on some devices with active cellular connections. support.microsoft.com
  7. 7. [Stability issue] Fixed: This update addresses an issue observed in rare cases after installing the May 2025 security update and subsequent updates causing devices to experience stability issues. support.microsoft.com
  8. 8. [Taskbar] Fixed: This update addresses an issue where the taskbar icons for accessibility features are not appearing. support.microsoft.com
  9. 9. [Printer] Improved: Printer names now appear more clearly when using IPP Directed Discovery, making it easier to identify printers during setup. support.microsoft.com
  10. 10. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 10 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 3/5, 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