A “better” approach than leaving it off is to add a :

The EMP.dll error in Assassin’s Creed Valhalla is a notorious runtime issue that typically presents as:

The multi-layered strategy outlined above succeeds where simple fixes fail because it addresses the core conflict: the inherent tension between security software (which views EMP.dll as a threat) and game functionality (which requires it). By establishing permanent folder exclusions, you create a "safe zone" where security scans never interfere.

Run sfc /scannow in an elevated Command Prompt to repair corrupted system files.