Most launch failures attributed to re5dx9.exe are actually caused by the defunct service. Even if you have the correct .exe , the game may refuse to start without a "GFWL Disabler" or the latest Steam version update that officially removed the service.
To install the patch, follow these steps: Download Re5dx9.exe Resident Evil 5
He realized the "Re5dx9.exe" wasn't a compatibility patch; it was a wiper malware themed after Albert Wesker. Most launch failures attributed to re5dx9
The original retail version of Resident Evil 5 used "Games for Windows Live," a service that has been largely discontinued. If you have an old pirated or retail disc version, the Re5dx9.exe may be trying to connect to dead servers and crashing. The original retail version of Resident Evil 5
So you have restored the file (via Steam verification). The game still crashes or gives errors. Follow this checklist: