Send Your Feedback for Smart Defrag v4 in Smart Defrag v4 Posted February 6, 2015 The interface is really problematic. Switching between parts of it take away other parts -- such as hitting "finish" after a defrag takes you away from the ability to view the drive and the status/results with no way to return without re-running defrag or analysis. The launching of a browser to show results is very annoying as well. It feels like about eight different applications with an overlay shell to switch between them. Un-intuitive and frustrating.