Need to format C:

I can't figure out how to format my C: drive on windows XP, cmd won't do it for some reason and I don't have a floppy drive to make a DOS boot disk. any help?

I just downloaded Firefix 1.5.0.7, and as a result, some web sites are showing up rather oddly. I think I had a slightly older version of 1.5, as it looks the same as the one I'm using now. Does anyone know what the version released before the most recent version of Firefox was, and where I could obtain it?

Whoops, wrong box.  I can't delete that, can I?