KB5086672 Update broke Internet and Ethernet

Question

Hello, I personally have to buy a Ethernet Connection today, as I'm writing this, I have just rolled back the update twice.

The update broke the Internet and Ethernet Connection, I am using Spectrum.
It has also broke the internet UI; requiring me to buy a Ethernet to even see the UI.

I have used the command prompt:

• ipconfig /flush dns which it says it could not flush DNS weirdly.)
• netsh winsock reset
• netsh int ip reset
• ipconfig /release
  And so many others, did not work.

I have went to regedit:

• WLAN AUTOCONFIG is already set to automatic
• Network Reset
• Etc

When I reinstalled it after getting Ethernet, it says that there's no DNS to my internet or ethernet which I did change but it didn't work, so yeah; this update is very weird, any real solutions?

Answer 1

KB5086672 is causing network issues for several users. Since you already tried the common resets and rollback, here are the only fixes that have worked for others:

1. Check if your network adapters were disabled Open Device Manager → Network adapters. If the Ethernet/Wi‑Fi adapter is disabled or shows an error, re‑enable it or reinstall it.

2. Reinstall the network drivers manually Download the latest drivers directly from the manufacturer (Intel, Realtek, Broadcom, Killer, etc.). Uninstall the current drivers → reboot → install the new ones. This has been the most reliable fix so far.

3. Uninstall KB5086672 and block it temporarily Until Microsoft releases a fix, removing the update is the safest workaround.

Conclusion: The update appears to corrupt certain network drivers. Reinstalling the drivers + removing the update is currently the most effective solution.

Answer 2

Same here - this update causes the DNS service to fail to start and it will not start manually. All dependencies are running, all drivers and other troubleshooting tips have failed. The only thing that works is rolling back the update.