Find why your flight simulator keeps crashing and fix add-ons, drivers, damaged files, memory pressure and settings with a safe isolation process.
A flight simulator crashes because of an incompatible add-on, damaged file, graphics-driver fault, exhausted RAM or VRAM, unstable overclock, or corrupted cache or preferences. Fix it by reproducing the crash with all add-ons disabled, repairing core files, resetting temporary data, testing stable drivers and stock hardware settings, then restoring extras one group at a time.
For flight simulators in general, first distinguish a crash to desktop from a freeze. If the picture stops but the application remains open, follow our separate freeze-and-stutter diagnosis; a program that closes, restarts or displays a fatal error needs the process below.
What does the point of the crash tell you?
The moment at which the simulator crashes is one of the best clues, although it does not prove the cause by itself.
| Crash pattern | Likely area | First test |
|---|---|---|
| Before the main menu | Plug-in, damaged configuration, driver or core file | Start without add-ons and repair the installation |
| While loading a flight | Aircraft, airport, scenery, navdata or memory pressure | Use a stock aircraft at a built-in airport |
| At one airport or location | Scenery conflict, terrain data or unusually heavy assets | Remove scenery for that area and lower detail |
| When changing view or enabling an instrument display | VRAM pressure, graphics driver or overlay | Reduce texture resolution and disable overlays |
| After flying for some time | Heat, unstable hardware, memory exhaustion or a leaking add-on | Monitor temperatures and memory, then test at stock clock speeds |
| Apparently at random | Overclock, RAM error, power instability, background software or USB driver | Return hardware to defaults and disconnect non-essential devices |
A reliable flight simulator crash-fixing sequence
The fastest reliable method is to create a clean baseline and change one variable at a time.
- Record the trigger. Note the aircraft, airport, weather, flight phase and action immediately before the crash. Test a new flight rather than repeatedly loading the same saved situation, which may itself be corrupted.
- Disable every third-party add-on. Use the simulator's safe mode if available, or temporarily move, rename or deactivate its add-on folders and plug-ins. Do not assume a livery is harmless; liveries, avionics packages, traffic tools and scenery libraries can all reference incompatible files.
- Repair the base installation. Run the launcher's or platform's file verification or repair function. Check whether security software quarantined a simulator file, but restore or exclude files only when they came from a trusted installation.
- Reset generated data carefully. Back up controls and customised settings, then use documented options to rebuild caches, shaders or preferences. Delete only generated files you can identify; removing content, saves or cloud-synchronised profiles blindly can create a second problem.
- Test the graphics driver. If crashing began immediately after a driver update, roll back to the previous stable release. Otherwise install a supported driver cleanly and restart the computer. A graphics-related fault can be caused by VRAM pressure or an unstable GPU even when the crash log names a driver file.
- Reduce memory and graphics load. Lower texture resolution, render scale, terrain or object detail, traffic and complex display refresh settings. Close memory-heavy background applications, leave the operating system's page file enabled and maintain enough free storage for caches. Older 32-bit simulators can hit their process memory ceiling even when the computer still shows free RAM.
- Remove software hooks and extra hardware. Disable recording overlays, performance monitors, frame-generation modifications and other programs that inject into the renderer. Disconnect non-essential USB panels and controllers for one test; a faulty device or driver can crash the simulator during enumeration or in flight.
- Return the PC to stock settings. Remove CPU and GPU overclocks or undervolts and test memory without an XMP or EXPO profile. A setting that survives other games may fail under a simulator's sustained CPU, GPU and memory workload.
- Restore add-ons in batches. Once the clean simulator completes the same flight, add content back in small groups. When the crash returns, split the last group in half until the offending package or combination is identified.
Use crash logs as clues, not verdicts
Crash logs, the operating system's reliability history and simulator-specific log files can narrow the search. Match the timestamp, error code and faulting module to the crash, but do not treat the named module as automatic proof: a graphics driver, for example, may be where unstable RAM or excessive VRAM use finally caused the failure.
How do I isolate a crashing add-on?
An add-on is confirmed only when the same flight works without it and fails again after it is restored.
For Microsoft Flight Simulator, use the staged MSFS add-on, cache and driver isolation process. X-Plane users should apply a clean plug-in, preferences and scenery test rather than removing random files. Prepar3D installations often need separate aircraft, scenery and configuration checks because several add-ons may load before a flight begins.
After a simulator update, test without all third-party content before blaming the base simulator. Compiled modules, avionics, weather engines and scenery libraries may require compatible releases; reinstalling the same outdated package will simply restore the crash.
Why does it crash with only one aircraft or airport?
A crash tied to one aircraft or location usually indicates that package, one of its dependencies, a scenery overlap or the additional memory load it creates.
- If a stock aircraft crashes at the suspect airport, test the airport scenery and its required libraries.
- If the suspect aircraft crashes at several built-in airports, test the aircraft, avionics and liveries.
- If the aircraft and airport work separately but fail together, look for a package interaction or combined RAM and VRAM pressure.
- If only one saved flight fails, create a new flight with the same aircraft and route before changing the installation.
Console crash troubleshooting
On a console, concentrate on updates, cached data and installed add-ons because driver and hardware-clock tests are unavailable.
- Fully power-cycle the console rather than resuming from standby.
- Install pending simulator and system updates.
- Disable or uninstall optional aircraft and scenery, then test the base simulator.
- Clear local cache or saved data only after checking what is cloud-synchronised and what will be permanently lost.
- Reinstall the simulator if the unmodified base installation still crashes consistently.
Should I reinstall the flight simulator?
Reinstall only after a clean add-on test, file repair and configuration reset have failed.
A normal reinstall may preserve the same user profile, cache or third-party packages that caused the fault, so it is not automatically a clean test. Back up control assignments, logs and irreplaceable custom content first, then follow the simulator's documented clean-install procedure and test the untouched base simulator before restoring anything.