Question : Desktop app registry and program files access under Vista and Windows7

I'm writing a desktop application in C# that must run under XP, Vista, and Windows7. Under XP the application can write to the registry and save file to an application subfolder in program files, e.g. "c:\program files\MyApp\DataFolder". When run under VIsta and Windows7 I get a popup dialog that it can't save files to the "c:\program files\MyApp\DataFolder", because of permissions, would I like to use my documents instead. Additionally code that writes to the registry under XP will not work under Vista/Windows7. What must I do to insure my app has the correct permissions to be able to perform these actions? This is a simple desktop application that the user installs using an installer built along with the project using VS2008.

Answer : Desktop app registry and program files access under Vista and Windows7

I guess it is User Account Control Problem, which prevent application from modify some system  data unless it runs under administrator account, try running the application as administrator from context menu of the application, and if you need the application to run elevated, do that from the compatibility tab in the properties of the exe application, another option is to disable the UAC for windows which is not recommended, I guess another option to store you data in different folder