microsoft / microsoft/Windows-driver-samples
[help] fastfat testing
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@msscolee is already working on this.
Since Nov 11, 2025.
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Description
After deleting C:/Windows/System32/Drivers/fastfat.sys, KDNET does not work:
PS C:\Program Files (x86)\Windows Kits\10\Debuggers\x64> .\kdnet.exe w11 50030
Failed to enable kernel debugging. Is secure boot enabled?
Attempting to enable kernel debugging on the {default} OS installation.
Failed to enable debugging on the {default} OS. Is secure boot enabled?
I am testing on Windows VM (Windows 11) using VMWare Workstation with Secure Boot disabled. After enabling Secure Boot, KDNET asks to disable it.
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