Now I can't login to window xp home as usual! There's even no "user name & Password" appeared on the welcome window! I tried to use "ctrl+alt+del" to have the classic login window showed up, but my user name doesn't work anymore!(I have only one user name and without a password), and administrator is not working either! I tried Safe Mode but it's the same, it seems that there's a password has been set up and I don't know it! It's weird because my wife just used the computer 1 hour ago and everything was fine! She just visited ebay and received some emails with outlook express and then turned the computer off, but when I restarted the computer one hours later, I find the user name & password disappeared on welcome window!
I have many important files and unfortunitely I didn't make any backup, so I really don't want to reinstall windows xp, it'll be appreciated if someone could help me with this.
Thanks!