Try reinstalling the Visual C++ Redistributable for Visual Studio 2015, 2017, and 2019. You can find these in the "Programs and Features" section of your Control Panel (Windows).
Title: Assassin’s Creed Valhalla – EmpDLL Resilience Update Type: Technical / Quality of Life Improvement Priority: High
Disable any overlays (e.g., Discord Overlay, NVIDIA GeForce Experience Overlay) as they can sometimes cause issues.