We’ll be using this forum thread to track known technical support issues, like conflicts which cause performance errors, crashes, and connection problems. Check out the list below, and give these steps a try before creating a new topic! Additionally, more bug-related issues can be found in the Bug Report Forum’s sticky.
Crashing on Launch - "Files in your Heroes of the Storm Installation are damaged"
This issue is caused by OneDrive being linked with the Documents folder where the folders and files for configuration are stored for Heroes of the Storm. Unlinking OneDrive or unsyncing the Documents folder will work around the issue.