Malfunction custom keyboard DLL & Windows Search

Hello,

I built a keyboard driver using Visual Studio and the official Windows driver samples. The DLL works perfectly regarding the keyboard and its behavior.

The problem is that when this keyboard is selected alone, Windows Search malfunctions and indexing stops. Even after restarting it manually, rebooting the machine breaks everything again.

When I load a native keyboard and this new keyboard together, the problem disappears. However, I would prefer to have only one keyboard selected.

I'm on Windows 11 Home H2 WDK 7600.16385.1. The keyboard was registered through an additional registry key and linked to the 40C code for French (France), in the same way the Microsoft Keyboard Layout Manager installer does. The event log shows that Windows Search is unable to start (but I’m not an expert). I tested permissions using icacls for Windows Search, but without success.

How can I fix this undesirable side effect?

Thank you!