VFP9 runtimes windows 10;

Hi guys One of my customers has an issue. First a user has my VFP9 program with the program in program files 86 and the runtimes in common files. All works fine. New user added and this user gets a problem with resource files not found. I assume these are the ones in common files plus the c++ dll. Anyone know why one user works and the other fails? TIA Al