If you're referring to the executable file for the PC version of Tekken 5, here are some general points:
The only executable file you should trust is pcsx2.exe from the official site. Tekken 5 Exe File
Running the executable today, whether on original hardware or through emulation, unlocks what is widely considered one of the greatest fighting games ever made. Here is why Tekken 5 still reigns supreme. If you're referring to the executable file for