If all the ways have not helped, try reinstalling Steam.ġ. Type regsvr32 steam-api64.dll and press Enter. If this does not fix the problem, follow these steps to register steam-api64.dll in the registry:Ģ. If these steps do not solve your problem, copy the file to the system folder. Copy steam-api64.dll to the folder that prompts for the file. dll file to any location on the computer.ģ. Open the zip file downloaded from Steam-api64.proĢ.