I upgraded from ME to XP Professional a few weeks ago and since then it hasn't let me into my computer. When I was upgrading, it asked me to set a username and a password(which I did). Now when I turn on the computer the only user it shows is "default" and it asks for a password ("default" doesn't work). When I start my computer using Safe Mode it has 2 users administrator and default. Using "admin", or "administrator" doesn't work for the password. How do I get into my computer without losing the data I have on it?