STRAIGHT TO THE SOLUTION
Start here
01Open the real executable↓02Remove the old mode↓03Check Steam separately↓01
Open the real executable
- Use Steam → Manage → Browse local files. Open re9.exe properties and capture the Compatibility tab.
02
Remove the old mode
- If an older Windows compatibility mode is enabled, disable only that switch. Leave other options unchanged initially.
03
Check Steam separately
- Test launching. If it still fails, inspect the Steam.exe actually used and disable its compatibility mode for a second test if enabled.
04
Compare outcomes
- Record which change helped. If both were already off, return to startup diagnosis instead of toggling unrelated options.
Related guide
Sources and current status
Frequently asked questions
Must the game always run as administrator?
This test concerns compatibility mode and does not require permanent elevation.
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