while attempting to set up first ever "network" between desktop and laptop, I renamed desktop computer and changed "domain name' to something else, thinking i would remember them better...didn't touch passwords.
Desktop (p3 512 mb Dell) runs xp pro, and used to be my son's work computer, so was set up for home networking to his work (but that had been disabled.)
big oops...now I can't get past login page...tried every word I would have used for desktop, all with original pasword, can't get in.
I hit f8 during boot but found that there was no earlier version to boot to.
what do I do now - Do I have to reformat and reinstall os?