If you purchased Aion via Steam and are running either Vista or Windows 7 you have probably realised that the Steam overlay is not working, there is a really simple fix though, put a shortcut to Steam on your desktop, then go to the properties of it and under the Compatability tab choose to run it in compatibility mode for Windows XP Service Pack 3 and choose to run as administrator, and voila the overlay will now appear in game and your hours will be recorded to your Steam profile!