11 Feb 2026

GUIDE: How to Run Flight Simulator 2004 on Windows 10 or 11

Flight Simulator 2004, also known as Century of Flight, still runs surprisingly well on modern Windows systems. It just needs a little coaxing. Nothing technical or scary, just a few small tweaks to help an older bit of software behave on a newer machine.

Start with the installation itself. Put the disc in or mount your digital copy, then open the installer manually rather than relying on autoplay. Right click the setup file, usually called setup.exe, and choose Run as administrator. This avoids permission problems that can quietly break older games during installation. Let it install to the default location unless you have a reason not to. It keeps things simple.

Once installed, go to the main game folder. This is often in Program Files (x86)\Microsoft Games\Flight Simulator 9. Find fs9.exe. Right click it and open Properties, then the Compatibility tab. Tick Run this program in compatibility mode and choose Windows XP (Service Pack 3). After that, tick Run this program as administrator as well. Click Apply and OK. These two settings fix most launch issues straight away.

If the game refuses to start or crashes instantly, install the official 9.1 update patch for Flight Simulator 2004. It improves stability and fixes several old bugs that show up more often on modern systems. Download it from a reputable archive or official mirror, run it, and point it to your Flight Simulator 2004 folder.

On Windows 10 or 11, sometimes the game struggles with fullscreen mode. If you see black screens or flickering, launch the game, go into the graphics settings, and switch to windowed mode first. After it runs properly, you can try fullscreen again. Windowed mode is often more stable on newer graphics drivers anyway.

If performance feels odd or stuttery, lower anti aliasing and filtering inside the game and let your graphics card software handle those instead. Older engines were not designed with modern GPUs in mind, so keeping settings modest usually gives smoother results.

Finally, if you use discs, keep in mind some very old copy protection systems do not work properly on modern Windows. If the game fails to recognise the disc even though it is inserted, you may need a legitimate digital version or a no disc executable from your own legally owned copy. This is simply because Windows removed support for certain outdated protection drivers.

After these steps, it should launch cleanly and run just like it did years ago. It is an old sim, but still charming and perfectly playable once set up.

You can buy Flight Simulator 2004: Century of Flight PC from Amazon at https://amzn.to/4rNezra

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