Hi guys.
For those who have problems launching the game, specifically a code 5 error (which may show as multiple attempts to inject), then please do the following.
1 - Navigate to the game installation folder.
2 - Right click ff7.exe and select properties.
3 - Click the compatibility tab.
4 - Select "run in 640x480 screen resolution"
5- Click ok.
This will not actually force that resolution but it is a workaround to the problem, your screen may momentarily go black when launching the game.