If you use FrontPage, be warned that under some circumstances it can wipe out your hard drive! It's an unlikely chain of circumstances, but at least one poor soul has done it.
IF you delete their default directory, AND IF you tell it to make a web in c:\ (your root directory where all sorts of important files live), AND IF you then tell it to delete that web, it will assume that the entire C drive IS the web, and delete it. All of it, data system files and all.
To prevent this NEVER CREATE ANYTHING IN THE C:\ AREA OF YOUR HARD DRIVE unless you are very sure what you are doing. Always make sure you create things with a path that looks like this: "C:\directoryname" to put things into a sub directory "directoryname".