Originally Posted by qwerty77
Including the leftover files in the waterfox folder.
I've tried this and even tried removing the profiles folder too (I know this shouldn't affect that, but was worth a try). I can install Waterfox 13 PL1 just fine to a fresh folder, but any of the Waterfox 14 installers fail. And it's because of an internal admin rights check in the installer. Windows isn't preventing or disallowing the installation, it's the installer itself. This has never been an issue on any earlier Waterfoxes or any Firefoxes, including 14. I believe this is a regression in the new installer, and like sfranklin1717 said, a deal breaker.