Sophos Home and Windows 11 Update KB5013943 bluescreen/stop error

[Gandalf_The_Grey]

This article applies to Windows 11 users with May 2022 Update (KB5013943) installed
If you are NOT running Windows 11 you do not need to take action

UPDATE: Users running Sophos Home 4.0.1 --> We are working to release a fix for this issue on Sunday, May 15th - Stay tuned for updates

If you are running Sophos Home 4.1.0 (Alpha user), you will automatically get the update, proceed to Restart your computer when prompted by Sophos Home

What's happening
Note: This issue is ONLY for Windows 11. It does not affect other Windows versions.

Customers on Windows 11 running Sophos Home may encounter a BSOD/Stop error after installing Windows Update KB5013943 and restarting their machines

The symptoms involve being unable to get to the desktop after restarting the computer/shutting down powering it back on post installation of Windows Update KB5013943
This includes a Stop Error Index Mismatch message (Blue Screen)

https://support.home.sophos.com/hc/en-us/articles/6257009398292

 

[harlan4096]

It seems that W11 update is affecting also to Kaspersky products:

Kaspersky does not start after installation of KB5013943

On May 10th Microsoft released KB5013943, once installed on Windows 11, it may disable .Net 3.5 and the user will not be able to start the Kaspersky product or have trouble installing/uninstalling the product. Workarounds: 1) Activate .Net using instruction: Activate .NET Framework 3.5 on Windows...

forum.kaspersky.com