Installation over 7.2.x failed (failure to find or recognize nero.msi). I used GoBack to restore my system, then tried uninstalling 7.2.x followed by reinstalling 7.5.x. The installation worked, but Nero SmartStart was not very smart. Clicking on the product logo page had no effect and did not bring up the registration page. Indeed, there seemed to be no way to bring up the product registration page. For the most part, Nero SmartStart appeared to be broken. After that, I used GoBack to restore my system to its previous state with Nero 7.2.x and gave up for now on Nero 7.5.x.