If you installed Forza Horizon 5 via the Microsoft Store or Game Pass, the Xbox backend services can cause 0xc00007b.
The error code is a "system startup error" that typically indicates a mismatch between 32-bit and 64-bit files . In the case of Forza Horizon 5, this usually happens when the game tries to load a 64-bit environment but encounters a corrupted or incorrect 32-bit DLL file. If you installed Forza Horizon 5 via the
Restart your PC after Windows finishes downloading the necessary files. Run as Administrator Restart your PC after Windows finishes downloading the
90% of 0xc00007b errors are caused by broken VC++ runtimes. He knew this error
"The '7b' curse," Leo whispered. He knew this error. It wasn't a glitch in the game; it was a civil war within his Windows system files. Somewhere, a 64-bit program was trying to talk to a 32-bit library, and they weren't speaking the same language. Chapter 1: The First Descent
If you have completed all 7 steps and still see "0xc00007b", the issue is likely hardware-adjacent: