Microsoft Windows 10-21h1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Microsoft Windows 10-21h1 reached end of life on 13 Dec 2022. It no longer receives security fixes.
Support timeline
Official dates from the Microsoft Windows release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 18 May 2021 | 5y 5mo ago |
| Security Support ended | 13 Dec 2022 | 3y 10mo ago |
| Latest release | 10.0.19043 | final |
Where to go from 10-21h1
Recommended target: Microsoft Windows 11-26h2-e (supported until 9 Oct 2029).
The newest actively supported branch is Microsoft Windows 11-26h2-e (latest release 10.0.26300).
Frequently asked questions
Is Microsoft Windows 10-21h1 still safe to use?
Microsoft Windows 10-21h1 reached end of life on 13 Dec 2022, 1,392 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Microsoft Windows 10-21h1?
Yes — the final release (10.0.19043) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Microsoft Windows 10-21h1 to?
Upgrade to Microsoft Windows 11-26h2-e, the newest actively supported branch (supported until 9 Oct 2029).