Windows 10’s Final Bow: Farewell Update KB5066791 Fixes Everything, Ends Support!
Microsoft bids Windows 10 farewell with the mandatory KB5066791 cumulative update, addressing six zero-day vulnerabilities. While this update marks the end of free updates, users can still embrace extended security updates like a clingy ex. Windows 10, it’s been real, but Microsoft is ready to move on to Windows 11.

Hot Take:
Microsoft is officially playing the breakup song for Windows 10, and it’s about as heartfelt as an “it’s not you, it’s me” speech. With the final curtain call of the Windows 10 KB5066791 update, it’s time to dust off those Windows 11 install discs and prepare for the future. But hey, at least they didn’t ghost us entirely, offering extended security updates like a clingy ex who just can’t let go.
Key Points:
- Microsoft releases Windows 10 KB5066791, the last cumulative update for the OS.
- Extended Security Updates (ESUs) available for 1 year (consumers) and 3 years (enterprise).
- Mandatory update includes fixes for six zero-day vulnerabilities and 172 other flaws.
- Update brings Windows 10 22H2 to build 19045.6456 and 21H2 to build 19044.6456.
- End of free support by Microsoft after October 14, 2025; users advised to upgrade to Windows 11.
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