NoCD

When a game is having trouble running because its own copy protection steps in even while you use the original CD, you can look for a NoCD crack online – this replaces the .exe files with DRM on them, so you can run them without that buggy copy protection. When you find a file, make sure to run it through a virus scanner (e.g. VirusTotal to not get viruses! You then install the game as normal and overwrite the files in the folder with the new ones.