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How can I crack the administrator password in Windows XP without a CD, floppy or any other kind of software?
For all intents and purposes, you can't that I am aware of. Essentially you would need a lucky guess. Now, I'm not sure if you intentionally or unintentionally left USB drive (pen drives) off your list, but if you intentionally left them off, then you could potentially use utilities on them to access the system and reset the passwords, but this would seem to break the "without using software" qualifier.