@harlan4096 @Berny @nexon
I am now FULLY SURE that Microsoft Defender platform update (KB4052623 version 4.18.24010.12) released in February is the cause of the bsod problem. I reproduced the bsod by the following steps:
1. Reset Windows (deleting all files)
2. Turn Boot-Start Driver Initialisation policy on and set the policy to allow "only good" drivers to be initialised.
3. Restart Windows: nothing happened.
4. Install Kaspersky Free 21.3. Restart Windows: nothing happened.
5. Restart Windows again: nothing happened.
6. Download the update from Windows Update Catalog website (see the picture), install it and restart Windows: BSOD appeared with code Inaccessible_Boot_Device.
PS: There was nothing in C:\Windows\System32\drivers\wd before installing the platform update. But after installation, the four .sys files I showed in the last post appeared (see the picture).
There are only two ways to solve this bsod:
1. Do not change the Boot-Start Driver Initialisation Policy ( leave it unconfigured). Or downgrade this policy from "only good" to "good and unknown".
2. Do not install the Microsoft Defender platform update (KB4052623 version 4.18.24010.12).
Thank you all for focusing on this uncommon problem. Contacting Microsoft is beyond my time. I hope the reproduction of the bsod would do some help if you want to further invesigate the problem.
