Anki 26.09.3 crashes on Windows 11 – Smart App Control blocks .pyd files

Hello,

I recently installed Anki 26.09.3 on my personal Windows 11 PC for the first time, but the application crashes immediately on startup.

The error message is:

ImportError: DLL load failed while importing _rsbridge:
This file was blocked by an application control policy.

I checked Windows Event Viewer under:

Microsoft → Windows → CodeIntegrity → Operational

I found the following:

  • Event ID: 3077

  • Blocked file: anki_rsbridge.pyd

  • Reason: The file did not meet the required signing level or violated a code integrity policy.

Windows Security also reported that another file, cd.cp313-win_amd64.pyd, was blocked because its publisher could not be verified.

Additional information:

  • Anki version: 26.09.3 (Windows x64)

  • Operating system: Windows 11

  • Smart App Control: On

  • Installation: First-time installation

  • Windows Update: No further updates currently offered

  • Result: The same crash occurs after updating and restarting Windows.

I would prefer to keep Smart App Control enabled for security reasons.

Is this a known compatibility issue with Anki 26.09.3? Is there a recommended solution that does not require disabling Smart App Control?

Thank you for your help.

A post was merged into an existing topic: Anki is not opening on my Windows 11 PC. Could Smart App Control be the issue?