Return of Reckoning

Error starting: System.UnauthorizedAccessException: Access to the path 'D:\Downloads\Warhammer Online - Age of Reckoning\WAR.exe' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 ...

I get this error when i log onto the launcher, what to do?

Error starting: System.UnauthorizedAccessException: Access to the path 'D:\Downloads\Warhammer Online - Age of Reckoning\WAR.exe' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream ...