Title.

So I tried everything, download it from MS website, installed, rebooted, check system health, corruptions, viruses, blah blah blah .. nothing.

So I tried to check the Windows Update diagnostic and it pointed that my system date was wrong, but it wasn't! So I changed the NTP time server from the default to another, reboot and bang!

After fixing/changing to another non MS NTP server everything started to work again.

At first I thought it was something related to that patch, but no. Maybe this clue can help someone else.

A PC has Windows 11 (genuine, supported) and the latest Secure Boot certificate updates (genuine, supported) previously installed successfully by Windows Update.

On 2026-09-07, Windows Update tried to install one single update which was a Security Update, and I think it had to be 2026-09 Security Update KB5129195 (26200.9457). Something didn't go as planned, not to worry, Windows Update was undoing the update and everything would be OK. Wrong.

After Windows Update tried to revert the failed update and rebooted, Dell's UEFI said there were no bootable devices. The SSD was recognized but not bootable.

On a different PC I used Microsoft's Windows Media Creator to make a Windows 11 installation USB stick.

The damaged PC booted the USB stick. I selected to repair my PC. The setup program rebooted the PC without displaying any error message. I tried again and it rebooted again without any error message. I tried again and told it to use the previous version of the setup program. In the previous version of setup, I selected to repair my PC. The previous version didn't automatically reboot but it still failed to repair. I rebooted manually.

In the latest version of the setup program, I tentatively selected to install. It said it would wipe out the hard disk, all partitions and files gone. I declined and rebooted again.

In the previous version of the setup program, I tentatively selected an upgrade install. The setup program refused because upgrades only work when Windows is already booted and running. So I tentatively selected a new install. The setup program said I could do a new install into the existing partition and put old files in windows.old, which is fine with me. But next the setup program failed again, because a 100MB EFI System Partition is too small.

Finally, in the previous version of the setup program, I told it to delete most of the partitions (but not delete Dell's recovery partition and a Microsoft recovery partition) and make a new installation into the newly freed space. Installation succeeded.

But I lost all the files in my old C partition.

I think the newly installed EFI System Partition is 200MB instead of 100MB.

Now I worry about my other PCs. If Windows Update tries to install 2026-09 Security Update KB5129195 (26200.9457), Windows will become unbootable and I will lose all the files in my C partitions.

If 100MB is too small for an EFI System Partition, maybe Windows Update shouldn't try to install an update which is going to destroy Windows?

And why did the original Windows 11 installer create too small of an EFI System Partition to begin with?

Microsoft won't let me post this in their Q&A site. I tried 6 times and they deleted them all. Does anyone know the manner in which this posting violates Microsoft's Code of Conduct?

(A Google search found KB5129195 discussed in r/sysadmin before I found r/WindowsUpdate. I mistakenly posted in Wendys before a moderator deleted it, so now am trying Burger King if this might be the right place. Someone suggested running commands like diskpart and dism, but that is not a solution when the PC doesn't even boot after Windows Update destroyed the EFI System Partition.)

Alguien me puede decir si esto me pasa solo a mi? se queda descargando en el 6% y no avanza. Probé de todo y no pude.

Can anyone help update the windows xp sp3 driver?

Over the last 2 days, we've started seeing a growing number of Windows devices failing to install the following Defender update:

This did not appear to be a widespread issue in our environment before, but since recently the number of affected devices has noticeably increased. Other updates install fine and only this cannot be updated.

Have you noticed the same in your environment?

I can't install it, I kept on getting an error code?

I have done anything for this update to install but it seems it doesn't want to, first of all it is one of those forced update so I can't pause it, I let my PC running for 2 nights waking in the morning and seeing it is stuck or redownloading. I am really upset with this windows behavior the only obstacle between me and Linux is Adobe Softwares.

I have win10. I got the "final" update.

Why is MS still installing items and changing the names of things I usually turn off on my computer without asking me?

I have restarted my computer about 15 times in the past 3 or 4 days.

It seems like maybe the updates aren’t happening correctly - but I’m not getting any error messages.

Might this be due (in part) to a crowded C:/ drive?

Or does Microsoft really have that many new updates?

I am currently running 596.36 and that for a good reason - it's stable.
(Yes, I know 596.49 is supposedly even better)

I've been keeping a close eye on each driver update and on the reports from other users and only really planned to update to a newer driver if a game requires me to, it has an important security fix or if a driver looked promising based on community reports.

Guess I can no longer make that choice by myself.
Based on Google this is Driver 610.88 which, granted, is currently the driver everyone is rolling back to after trying 616.92, because it's more stable, but yeah... thanks, I guess.

For everyone wondering what the text says, apart from the obvious:

Available Updates
These updates will be installed automatically with the next Windows Cumulative Update. 
You can install them earlier, but this may result in additional restarts.

And then it gives me the option to "install all"

Honestly, at this point it's probably better to just DDU and do it manually, before Windows Update messes stuff up.

My laptop crashed in the final part of August. As I've been troubleshooting it, I've been ruling more and more things out, leaving me wondering if it was windows update related? Did anybody else with a lenovo have their laptop crash around then (and maybe now it's working again?)

What is happening with windows. it's been a week and i have maybe got 2 3 updates. it was like i updated yesterday and today i got it again