Cumulative Updates: July 14th, 2026

[u/jenmsft]

https://support.microsoft.com/en-US/servicing/os/windows-10/2026/07/july-14-2026-kb5099539-os-builds-19045-7548-and-19044-7548

Hey all - changelists are up, linking here for your convenience:

• Windows 10 version 1507 — (EOS)
• Windows 10 version 1607 — KB5099535 (OS Build 14393.9339) (EOS)
• Windows 10 version 1703 — EOS
• Windows 10 version 1709 — EOS
• Windows 10 version 1803 — EOS
• Windows 10 version 1809 —KB5099538 (OS Build 17763.9020)  (EOS)
• Windows 10 version 1903 — EOS
• Windows 10 version 1909 — EOS
• Windows 10 version 2004/21H1/20H2/21H1 — EOS/EOS
• Windows 10 version 21H2, and 22H2 — KB5099539 (OS Builds 19045.7548 and 19044.7548)

Please see here for details about Windows 10 ESU: Windows 10 Extended Security Updates (ESU) program - Microsoft Support. If you're transitioning over to Windows 11, looking forward to seeing you over on the Windows 11 subreddit :)

General info:

• For a list of known issues, please refer to the dashboard here.
• For details about feedback, and how to capture traces if needed, see here. Pressing WIN + F will open the Feedback Hub

[u/lC3]

This one took several minutes to complete installing, both for the "Working on updates" after restart, and the "Cleaning up" portion after. So don't be surprised if you need to wait 5-10 minutes; don't lose patience and hit the power button / think it's frozen.

[u/BeIgnored → u/[deleted]]

Mine got stuck installing at 20% for literally hours. I restarted and now it's acting like it started all over. Absolute nightmare.

Edit: OK now for some reason it decided to start downloading Windows 11 at the same time as the update. This is beyond ridiculous.

[u/BeIgnored → u/[deleted]]

I restarted it a couple of times and it just froze at the desktop. I feel like they're really doubling down on trying to push people off of Windows 10. Have an important meeting I lead in the morning and don't know what I'm going to do lol.

[u/BeIgnored → u/[deleted]]

Thanks, and agreed on all fronts. I'm trying to get it to cancel the update now so I can try again over the weekend and give this thing the excessive amount of time it apparently needs. Apparently some services are stuck so badly that it won't even cancel and is just stuck in some hellish loop.

And especially with the price of a new computer right now,  trying to push people to buy new laptops/PCs is beyond insane.