I think I have found the issue it worked for me (So far) 1. Click on the windows button and go into Computer. 2. Click on the blue memory bar button (For me it says OS(C:). 3. Once you have do that find the folder that is called Program Files (x86) HAS TO HAVE THE (x86). 4. Look for the folder called Steam and click on that. 5. Then look for the folder called steamapps. 6. Then go in the folder common. 7. Then go on the folder arma 2 operation arrowhead. 8. Find the folder @Dayz should be at the top and then delete it. 9. Open six launcher and install it again (Not sure if it work by installing it on Dayz Commander). Hope this helps. :)