The Update BureauKB5062070: Cumulative update for .NET Framework, versions 3.5 and 4.7.2, on Windows 10 1809 and Windows Server 2019, July 2025. .NET library timing issues and error dialogs addressed
In short
Addresses a timing issue in .NET library functions and error-reporting dialogs that could appear while .NET libraries load.
Does it affect you? Applies to: Devices running Windows 10, version 1809, or Windows Server 2019 with .NET Framework 3.5 or 4.7.2 installed.
What changes
Fixes 2 changes
.NET Libraries
For: Devices with .NET Framework 3.5 or 4.7.2
-
Some .NET applications that inspect object properties work more reliably when several operations happen at once.1
Addresses a concurrency issue involving
TypeDescriptor.GetProperties()andTypeDescriptor.GetConverter().
.NET Runtime
For: Devices with .NET Framework 3.5 or 4.7.2
-
Applications might no longer show error-reporting dialogs when .NET loads a library while Windows checks whether its code is trusted.2
Addresses interactions between .NET Framework DLL loads and 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
- KB5054695
- Replaced by
- KB5065744
| Version | File version | Channel |
|---|---|---|
| 3.5 | 2.0.50727.9066 | General availability |
| 4.7.2 | 4.7.4135.0 | General availability |
Security
No vulnerabilities are listed for this update.
Downloads (Microsoft Update Catalog)
x64
Windows 10 Enterprise LTSC 2019 / Windows Server 2019
84.4 MB
Arm64
Windows 10 Enterprise LTSC 2019
47.2 MB
x86
Windows 10 Enterprise LTSC 2019
47.3 MB
Updated components
28 files changed since the previous update for the same versions.
| Top changed components | Files |
|---|---|
| .NET runtime (CLR) | 18 |
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 5/5, 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