The Update BureauKB5062064: Cumulative update for .NET Framework, version 4.8, on Windows 10 1607 and Windows Server 2016, July 2025. .NET load error dialogs and library concurrency issue addressed
In short
The update addresses a library concurrency problem and an issue that can trigger error dialogs when .NET files load. It adds no new security improvements but includes earlier ones.
Does it affect you? Applies to: Devices running Windows 10, version 1607, or Windows Server 2016 with .NET Framework 4.8 installed.
What changes
Fixes 2 changes
.NET Libraries
-
A problem with .NET property and converter calls happening at the same time is addressed.1
Concerns concurrency in
TypeDescriptor.GetProperties()andTypeDescriptor.GetConverter().
.NET Runtime
-
An issue that can cause error dialogs when .NET files load is addressed.2
The issue involves .NET Framework DLL loads interacting with the OS code integrity enforcement policy.
Technical details
Data sheet · Security · Downloads · Components Click to collapse or expand
Data sheet
- Released
- 2025-07-08
- Classification
- Updates
- Type
- Cumulative update
- Restart
- Required
- Replaces
- KB5055170
- Replaced by
- KB5065749
| Version | File version | Channel |
|---|---|---|
| 4.8 | 4.8.4795.0 | General availability |
Security
No vulnerabilities are listed for this update.
Downloads (Microsoft Update Catalog)
x64
Windows 10 Enterprise LTSB 2016 / Windows Server 2016
60.4 MB
x86
Windows 10 Enterprise LTSB 2016
33.5 MB
Updated components
19 files changed since the previous update for the same versions.
| Top changed components | Files |
|---|---|
| .NET runtime (CLR) | 12 |
Sources
Updated
Cited passages from Microsoft's official notes (2)
-
1.
Addresses an issue with concurrency in TypeDescriptor.GetConverter()issue in TypeDescriptor GetProperties() and GetConverter().
support.microsoft.com -
2.
Addresses an issue where interactions between .NET Framework DLL loads and OS code integrity enforcement policy trigger error reporting dialog boxes.
support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 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 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