Measure 4: Run the System File Checker (SFC) tool The SFC tool can aid repair problems with system files, including the Steam API 64r DLL file. To run the SFC tool:
What is Steam API 64r DLL?
Start the Steam app and go to Library. Right-click on the software that’s causing trouble and select Properties. Click on the Local Files tab. Click on Verify Integrity of Game Files. steam api 64r dll