Windows Service Stack Updates
Microsoft from time to time will update the Service Stack that provides improvements to the update process in Windows along with some other Windows features. The page linked below has all of the latest Service Stack updates for each version of Windows. These updates should appear in Windows Update as they are released by Microsoft.
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/ADV990001
By installing updates, the following things may be improved:
- Ensure that updates can be installed as they may require a specific Service Stack version.
- Improve the reliability of the update process.
- Improve the performance.
- Other improvements outlined in the description of individual Service Stack Updates.
| Product | SSU Package | Date Released |
|---|---|---|
| Windows Server 2008 | 5056457 | April 2025 |
| Windows 7/Server 2008 R2 | 5056456 | April 2025 |
| Windows Server 2012 | 5066795 | October 2025 |
| Windows 8.1 Windows Server 2012 R2 |
5027574 5066794 |
June 2023 October 2025 |
| Windows 10 | 5066587 | October 2025 |
| Windows 10 Version 1607/Server 2016 |
5066584 | October 2025 |
| Windows 10 Version 1703 | 4521859 | October 2019 |
| Windows 10 1709/Windows Server, version 1709 | 4565553 | July 2020 |
| Windows 10 1803/Windows Server, version 1803 | 5001400 | April 2021 |
| Windows 10 1809/Server 2019 * |
5031589 17763.7912 |
October 2023 October 2025 |
| Windows 10 1903/Windows Server, version 1903 | 4586863 | November 2020 |
| Windows 10 1909 |
5005412 | August 2021 |
| Windows 10 2004 * |
5005260 |
August 2021 |
| Windows 10 20H2 * |
19042.1704 19042.2905 |
May 2022 May 2023 Ent. |
| Windows 10 21H1 * |
19043.2300 |
December 2022 |
| Windows 10 21H2 * | 19044.6499 | October 2025 |
| Windows 10 22H2 * | 19045.6499 | October 2025 |
| Windows 11 21H2* | 22000.3250 | October 2024 |
| Windows 11 22H2* | 22621.6051 | October 2025 |
| Windows 11 23H2* |
22631.6051 | October 2025 |
| Windows 11 24H2* |
26100.6893 | October 2025 |
| Windows 11 25H2* | 26200.6893 | October 2025 |
| Windows Server 2022* | 20348.4285 | October 2025 |
| Windows Server 2025* |
26100.6893 | October 2025 |
* – Service Stack updates are included in the monthly updates for these versions of Windows and any released since 2021
How can I check if my computer has the latest Service Stack update
- Determine version of Windows
- In Windows 10, choose Settings, System, About – Version
- Click Start, search for Programs and Features, click View Installed Updates
- In the upper right Search Installed Updates type in KB# listed in table above for your version of Windows.