The Update BureauKB5065790: Cumulative update for Windows 11, version 23H2, September 2025. SMB file sharing and SIM-PIN sign-in problems fixed
In short
Addresses SMB file-sharing failures and fixes a sign-in screen freeze after entering a SIM PIN.
Does it affect you? Applies to: Devices running Windows 11, version 23H2.
Review notes Additional details from the official release notes (1) Read note
- What changes The package includes servicing stack update KB5066412 (build 22621.5983), which improves the component that installs Windows updates.
The official sources are linked at the end of the page.
What changes
Fixes 8 changes
Authentication
- The sign-in screen no longer stops responding after you enter a SIM PIN while signing in over a mobile broadband connection.1
Browser
For: devices using Internet Explorer compatibility mode in Microsoft Edge
- Addresses an issue that could make Microsoft Edge stop responding when certain same-domain redirects occur in Internet Explorer compatibility mode.2
Display Kernel
Verified in package
For: devices using multi-monitor RDP sessions
-
Addresses an issue that could shut down the system after disconnecting from a dock during a multi-monitor Remote Desktop streaming session.3
The issue affects display configuration changes during Remote Desktop Protocol (RDP) sessions with multiple monitors.
Input
2 items
Networking
Verified in package
For: devices using SMB v1 over NetBT
-
Addresses an issue that could prevent access to shared files and folders over SMB v1.6
The issue occurs with SMB v1 over NetBIOS over TCP/IP (NetBT) and can follow installation of KB5065431.
Printer
Verified in package
For: devices using shared printers
- The printer queue in Settings for a shared printer no longer stops working.7
System services and reliability
- Addresses the issue that caused the McpManagement service to appear without a description.8
Improvement 1 change
Country and Operator Settings Asset (COSA)
Verified in package
- Profiles for certain mobile operators are brought up to date.9
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2025-09-23
- Classification
- Updates
- Type
- Cumulative update
- Restart
- Required
- Replaces
-
KB5065431, KB5064080, KB5066189, KB5063875
+39 earlier
KB5062663, KB5062552, KB5060826, KB5060999, KB5062170, 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
- KB5066793
| Version | Build | Channel |
|---|---|---|
| 23H2 | 22631.5984 | General availability |
| 23H2 | 22631.5984 | Release Preview Channel |
Security
No vulnerabilities are listed for this update.
Downloads (Microsoft Update Catalog)
x64
23H2
906.3 MB
Arm64
23H2
1.0 GB
Updated components
1,338 files changed since the previous update for the same versions.
| Top changed components | Files |
|---|---|
| Graphics and display | 25 |
| File Explorer and shell | 24 |
| Networking | 21 |
| Windows Update | 16 |
| Settings | 15 |
| Search | 14 |
| Remote Desktop | 12 |
| Hyper-V and virtualization | 11 |
| Security and sign-in | 10 |
| Storage and file systems | 10 |
| Kernel | 7 |
| Bluetooth | 6 |
Verified in package: changed files confirm Display Kernel, Networking, Printer, Country and Operator Settings Asset (COSA).
Sources
Updated
Cited passages from Microsoft's official notes (9)
-
1.
Fixed: An issue that caused Windows sign-in screen to stop responding after a user enters the SIM PIN during sign-in using a mobile broadband connection.
support.microsoft.com -
2.
Fixed: This update addresses an issue that affects Microsoft Edge when running in Internet Explorer compatibility mode. It stops responding due to certain same-domain redirects.
support.microsoft.com -
3.
Fixed: This update addresses an issue that affects display configuration changes during Remote Desktop Protocol (RDP) sessions with multiple monitors. The system might shut down unexpectedly when disconnected from a docking station during a streaming session.
support.microsoft.com -
4.
Fixed: An issue where some characters didn’t display correctly when using the Chinese Input Method Editor (IME).
support.microsoft.com -
5.
Fixed: This update addresses an issue where certain Chinese characters appeared as empty boxes in some text fields, such as those used in Connection Manager Administration Kit, when a character limit was set.
support.microsoft.com -
6.
Fixed: This update addresses an issue where you might not be able to connect to shared files and folders if you're using the Server Message Block (SMB) v1 protocol on NetBIOS over TCP/IP NetBIOS (NetBT).
support.microsoft.com -
7.
Fixed: An issue where viewing the printer queue in Settings for a shared printer caused the Print Queue user interface to stop working.
support.microsoft.com -
8.
Fixed: Addresses an issue that caused McpManagement service to appear without a description on Windows.
support.microsoft.com -
9.
Fixed: This update brings profiles up to date for certain mobile operators.
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 4/5. 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