X3DAudio1_6.dll
If you receive the following error on launching the demo: "Demo failed to launch, X3DAudio1_6.dll was not found," you need to make sure you have the latest Directx 9 Redistributable installed. It can be downloaded here.

It's possible that extracting the demo with winzip can cause a CRC or corruption error to be reported, we recommend you use 7zip to extract the demo from the archive.

Installation problems
- Uninstall ARMA II DEMO completely from the Startmenu.
- Manually erase all datas found in the installation folder of ARMA II DEMO
- Install ARMA II DEMO from scratch again.

If at any point during a mission you become stuck, or the mission does not progress it is recommended that you restart the mission from the beginning. If the mission looks too hard for you, restart it as well with lower difficulty or try different approach. Missions can be played differently every time.

If you encounter any sound or graphical issues while running the game, please make sure you have installed the latest versions of your hardware drivers and try to tweak your audio and video options.