You can't reformat the operating system drive from 'within' the operating
system. The system is being used so how can it format itself? Use the
Windows XP CD and install XP to your drive. I assume you have a full retail
copy of XP? For more details on installing see this link on my website:
http://xphelpandsupport.mvps.org/how_do_i_install_windows_xp.htm
At step 11 in the tutorial select the partition/drive containing Vista and
then press D on your keyboard to Delete the partition ( you will need to
confirm deletion etc). Afterwards you will have a 'raw' unallocated space
drive. Now, if you look at the step 11 screenshot, you will see that you
need to press C to create a new partition. Do this and size the partition
accordingly. Once the partition has been created you will be shown the
options to format. Select Format the partition using NTFS. Allow the
partition to format and then continue with the installation as per my
website instructions.
--
John Barnett MVP
Associate Expert
Windows - Shell/User
Web:
http://xphelpandsupport.mvps.org
Web:
http://vistasupport.mvps.org
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