Cumulative Updates Failing After 24H2 Upgrade
Localhost applications failing after installing "2025-10 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5066835) (26100.6899)" - Stack Overflow
Issues with KB5063878 on Windows 11 24H2?
Windows 11 24H2 June update (KB5060842, 26100.4349) withdrawn?
Videos
I have to uninstall the security update KB5066835 to make it work.
Then uninstall KB5065789
Independent advisors appear to confirm that it is indeed the KB5066835 update that introduced the bug. The issue appears to be related to the HTTP/2 protocol.
Temporary fix without uninstalling KB5066835:
- In the registry, navigate to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters - Under the Parameters folder, right-click in the right-hand pane and select New > DWORD (32-bit) Value.
- Name the value EnableHttp2Tls and set its data to 0 (zero).
- Repeat the process to add another value named EnableHttp2Cleartext and set its data to 0.
- Restart the machine.
EDIT : Updating to the latest Windows Defender update (Security Intelligence Update for Microsoft Defender Antivirus - KB2267602 (Version 1.439.210.0)) and rebooting seems to be a possible resolution for some users
Hi everyone, I’ve received a report from a client claiming that the cumulative update KB5063878 for Windows 11 version 24H2 is causing freezes and even SSD damage when working with large files (50GB or more). Has anyone else experienced this issue? Is there any official statement or reliable source confirming it? Thanks for reading.
Just discovered that all my Windows 11 24H2 clients are no longer being offered the June update from Windows Update, and not the out-of-band KB5063060 replacement either (not that they had Easy Anti-Cheat installed, of course). It's still being offered to Windows Server 2025 machines.
I can't find anything saying that the update has been withdrawn for clients, so I'm at a loss. I'll push it out manually if I have to.
Has anyone else seen this or can confirm with their own clients, please?
Edit: Confirmed.
I've just tested in a totally different environment with a totally different machine, and I've also tested with a VM in my home lab. As of some point in the recent past, Windows Update has stopped offering Windows 11 24H2 clients KB5060842 (or KB5063060), so they're stuck on May 2025 (26100.4061) without manual intervention.
If anyone has any further information about this (especially whether it's a deliberate decision on Microsoft's part or a mistake), I'd be grateful to hear it.
My PC had been working fine with Windows Update, until this January 2025.
There was a Cumulative Update for Windows 11 Version 24H2, which normally will happen once per month, and the January update always failed.
I contacted Microsoft helpdesk, and the tech support remoted into my PC. What he did was, downloaded the latest version of Windows 11 Version 24H2 ISO image from Microsoft website, and run the Setup. It will reinstall the system, while keeping its existing user data and installed apps.
It worked, and the January Cumulative Update shown as successful as well.
Just that I thought it was over, the same issue happened again with February Cumulative Update. The update kept on failing again.
I downloaded the latest version of Windows 11 ISO image from Microsoft website again, using the method that I watched the Microsoft tech guy used, and it worked again.
Now, the same issue comes back again in March. I can't be using the same workaround every month, right?
A side note:
After the Cumulative Update for Windows 11 in January failed, my Windows Sandbox also failed to launch. Everytime I tried to run it, it crashed when initializing.
I have the thinking that the crashing Windows Sandbox might be interrelated with the failed Windows cumulative update. I told the Microsoft guy during his troubleshooting. Unfortunately, he knew nothing about Windows Sandbox.
The issue with Windows Sandbox was complicated. I can't uninstall it by unchecking it from the Windows More Features list. The uninstallation process will fail and caused a roll-back, then the Windows Sandbox will remain there.
This is what I have done in March:
I downloaded the latest Windows ISO again, and run the Setup again.
While the Windows Setup was running (and before Windows reboot to continue its Setup), I found that I was able to uncheck and uninstall Windows Sandbox.
This round, after Windows Setup completed, the latest "2025-03 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5053598)" was not yet installed.
After checked for Windows update, alongside this "2025-03 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5053598)", there is another "2025-01 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5049622)" which supposed to be successfully installed right before the January Windows cumulative update.
I manually clicked the install button, both of them successfully installed without any issue. Yes, this round, the 2025-03 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5053598) is successful.
After that, I tried install back Windows Sandbox again, it was successful, and Windows Sandbox is working fine again.
This is my guess:
Some flaws in 2025-01 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5049622) had caused issue in both Windows Sandbox as well as all subsequent Windows cumulative updates after it was applied.
Perhaps Microsoft had secretly fixed the bug in the latest version of this KB5049622, which might have bug in January. So, reinstall this KB5049622 has fixed both the Windows cumulative update issue as well as the Windows Sandbox issue.
Let's monitor for a few weeks to confirm the above conclusion... I hope that I had found the root cause and permanent fix for the 2 issues above, and they won't come back again next month.
Finger crossed.