How can I add an admin account, or remove accounts from a school computer?

Question

I recently got an old computer from my school because they were upgrading and the two that I now have were going to be thrown out. They are both Dell Optiplex GX1 and I can currently log onto only one. I would like to remove all of the accounts that they would use for security so I am the default user/admin, or add/access an administrator account so that I can remove all of the safety features.

My second option would be to just format the drive and the install Ubuntu. How can I format the drive without having administrator access to the computer though?

Answer 1

Reformat them. Put in a Operating system CD. Say it is Windows XP. Turn on the computer and click F12 this should bring up options. Change the option that gets you to boot from the hardrive. Now change to boot from CD. Voila. Just go from there.