"RPCS3 is not a valid Win32 application."

Additionally, the very old and busted 32 bit .exe will not run on XP either, same goes for the 64-bit version and 64-bit XP, it will not run. Modern versions of Visual Studio will not build for XP.

Also, if your computer is seriously so slow or old that it can't run 64-bit Windows 7 or a modern Linux distro, it probably won't even be fast enough for even homebrew pong.