Thread: What does "nothing" actually mean?

In this instance nothing means that anything from the former installation eg: Your files and folders, will be removed.

On the flipside, what does "Just personal files" mean?

That would be anything in your "User" folder, Pictures, Music, Videos, etc:

You would still have to re-install any programs, customizations, etc; in either scenario.

Thanks, but what I was looking for was if anybody knew if it wiped or formatted other drives. I have two disks, one with 4 partitions (C, D, E and V) and another with a single (F). I don't care if it wipes C, in fact that's what I want it to do. Just don't want it to wipe the others. But the upgrade process doesn't give you the choice of where it goes or what it formats, just "Just personal files" and "Nothing". Once you hit the "Next" button it just sits there with the little circle spinning. Maybe if I left it longer it would come back with more options or choices but I just feel nervous about selecting "Nothing".