The application is portable and no installation is required. Just download (2.2Mb), unzip and run it. It will sit on the system tray. You can select and apply different boarder styles and other effects from there.
However, like every visual style program, this one is also not free from instability. It has some minor bugs, especially if ‘Aero explorer’ enabled on maximized window.
You can download Boarder style from here.