How to do a Clean Reinstall of Firefox
Sometimes, when you have a problem, the only thing it seems you can do is to uninstall and reinstall.
However, when you do that, there are often more steps that you should take, than to just use Add/Remove Programs to uninstall and then reinstall immediately.
Using Firefox as an example, let’s take a look at the steps you might need to take. (I use Firefox because it includes the concept of data files that you want to keep, too.).