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Added info about .NET Framework 4.8.1 Release 533509 (Windows 11 25H2) #49306

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merged 4 commits into from
Oct 20, 2025
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Added info about .NET Framework 4.8.1 Release 533509 (Windows 11 25H2) #49306

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b64854d
Added info about .NET Framework 4.8.1 Release 533509 (Windows 11 25H2)
bairog Oct 18, 2025
d6844f6
Updated ms.date in both files
bairog Oct 20, 2025
dfed961
Merge branch 'dotnet:main' into main
bairog Oct 20, 2025
141e5ca
Apply suggestions from code review
gewarren Oct 20, 2025
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4 changes: 2 additions & 2 deletions docs/framework/install/how-to-determine-which-versions-are-installed.md
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---
title: Determine which .NET Framework versions are installed
description: Use code, regedit.exe, or PowerShell to detect which versions of .NET Framework are installed on a machine by querying the Windows registry. Or, check Control Panel.
ms.date: 07/10/2025
ms.date: 20/10/2025
dev_langs:
- "csharp"
- "vb"
Expand Down Expand Up @@ -86,7 +86,7 @@ The **Release** REG_DWORD value in the registry represents the version of .NET F
| .NET Framework 4.7.1 | On Windows 10 Fall Creators Update and Windows Server, version 1709: **461308**<br/>On all other Windows operating systems (including other Windows 10 operating systems): **461310** |
| .NET Framework 4.7.2 | On Windows 10 April 2018 Update and Windows Server, version 1803: **461808**<br/>On all Windows operating systems other than Windows 10 April 2018 Update and Windows Server, version 1803: **461814** |
| .NET Framework 4.8 | On Windows 10 May 2019 Update and Windows 10 November 2019 Update: **528040**<br/>On Windows 10 May 2020 Update, October 2020 Update, May 2021 Update, November 2021 Update, and 2022 Update: **528372**<br/>On Windows 11 and Windows Server 2022: **528449**<br/>On all other Windows operating systems (including other Windows 10 operating systems): **528049** |
| .NET Framework 4.8.1 | On Windows 11 2022 Update and Windows 11 2023 Update: **533320**<br/>All other Windows operating systems: **533325** |
| .NET Framework 4.8.1 | On Windows 11 2025 Update: **533509**<br/>On Windows 11 2022 Update and Windows 11 2023 Update: **533320**<br/>All other Windows operating systems: **533325** |

#### Minimum version

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3 changes: 2 additions & 1 deletion docs/framework/install/versions-and-dependencies.md
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---
title: .NET Framework & Windows OS versions
description: Learn about key features in each version of .NET Framework, including underlying CLR versions and versions installed by the Windows operating system.
ms.date: 07/10/2025
ms.date: 20/10/2025
helpviewer_keywords:
- "versions, .NET Framework"
---
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To determine the installed .NET version, use the following `Release` DWORD:

- 533509 (Windows 11 September 2025 Release)
- 533320 (Windows 11 September 2022 Release and Windows 11 October 2023 Release)
- 533325 (all other OS versions)

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