HelloI have just installed Windows Vista Home Premium in a dual boot configuration.I have Flight Simulator X on my XP installation but thought that I will now run it on Windows Vista.I installed Flight Simulator X and when I try to run it I get the following error:'The application has failed to start because it's side-by-side configuration is incorrect.I have no uninstalled it from XP but still no go...What could be causing this? Microsofts Website is useless!!!Any ideas?Thanks,Gian

Had the same problem and I tried reinstalling FSX about two times and nothing worked. The boys at Microsoft Games Escalation Support Team came to the rescue after a few days of scratching their heads and this is what they came up with.Please try the steps below to resolve the issue with Flight Simulator X and your side-by-side configuration error,Step 1: Download and Install Visual C++Please click on the link below,http://msdn.microsoft.com/vstudio/express/visualc/download- Click on the Download option under Download and install- Click on save and save it to your desktop- Run the file from the desktop and restart the computer- Try Flight Simulator XWorked like a charm and now I am flying the friendly skies. :-bigangel Enjoy...

While looking at add/remove programs I noticed the C++ runtime executable. I didn't specify it. I think it may have downloaded with MS update? Perhaps thats why I had no problems installing FSX. That is outside of typing in a wrong key letter.