Most No-CD patches are specifically for version 9.1 .
Running Microsoft Flight Simulator 2004 (FS9) on modern systems like Windows 10 or 11 often requires a because Microsoft deactivated the "secdrv" driver responsible for older disc-based copy protection. Essential FS9 Launch Fix Guide No Cd Crack Fs9
To prevent crashes or black screens: IF YOUR FS2004 WILL NOT START UP READ THIS Most No-CD patches are specifically for version 9