FS9 / FSX possible issues while installing on Vista and Windows 7

Due to the big number of changes that the two operating system have implemented, especially in term of security and system folder structure here are a couple of tips to solve some of the issues you may encounter while installing Microsoft Flight Simulator on Windows Vista or 7.

fsx.cfg and fs9.cfg file location on Vista:
C:\users\(name)\Appdata\roaming\microsoft\fsx
C:\users\(name)\Appdata\roaming\microsoft\fs9

fsx.cfg and fs9.cfg file location on Windows 7
C:\users\(name)\Appdata\roaming\microsoft\fsx
C:\users\(name)\Appdata\roaming\microsoft\fs9

scenery.cfg on windows 7 has moved as well to:
C:\ProgramData\Microsoft\FSX
On fs9 scenery.cfg is located in flight simulator installation folder.

Problem: My settings are not saved after I leave flight simulator.
Solution1: Try running FSX / FS9 as an administrator (Right click on FS shortcut and choose Run as administrator)
Solution2: If above does not work give full control to the folder where fs9.cfg or fsx.cfg is located (see above folders depending on the system). To do this right click on the folder (e.g. C:\users\(name)\Appdata\roaming\microsoft\fs9) -> Proprieties -> Security (tab) -> Edit (button) -> Add > write "Everyone" and check all options including Full Control.

Problem: Cannot set antialiasing properly in FSX /FS9
Solution: Use nhancer. Full details here.