Freilich,
I can only answer half of your problem. To format you
hard drive go to the DOS prompt (click start go to the
run prompt and type "cmd" . This will put you at the
command prompt ie c:documents and setting......bla bla.
Type cd\ (change directory) and you get the C:\ prompt.
From here type "format C: and it will ask do you really
want do this...and you say "y". As far as the
installation of windows I could not give you a good
answer. When you do get a good answer as to how to
reinstall could you e-mail me with your explanation