One or more dll file were missing or damaged

Hello experts,
I ran a DLL fixer and reinstalled the Tiberian Sun, rebooted the PC and the DLL files still missing from my PC. I want to copy manually the DLL files but I don’t know which one is missing. Can anyone please tell me how can I fix this DLL files error? Is there a way to fix this without reinstalling the Windows 7?
Thank you!

Tiberian Sun
One or more DLL files were missing or damaged. Please reinstall.
OK
