do you have your windows xp cd or restore cd? a msdos boot disk? if you have any of those, do this:(its sorta complicated, it happened to my computer and i didnt know the admin pass... rrgh)
2. Insert the Windows XP CD-ROM into your CD-ROM or DVD-ROM drive, and then restart your computer.
3. When you receive the "Press any key to boot from CD" message, press a key to start your computer from the Windows XP CD-ROM.
4. When you receive the "Welcome to Setup" message, press R to start the Recovery Console.
5. If you have a dual-boot or multiple-boot computer, select the installation that you have to use from the Recovery Console.
6. When it asks type the administrator password (just leave it blank if you've never changed it before) and then press enter
7. At the command prompt, type bootcfg /list, and then press enter. some entries in your current Boot.ini file appear on the screen
8. At the command prompt type bootcfg /rebuild, and then press enter. This command scans the hard disks of the computer for Windows XP, Microsoft Windows 2000, or Microsoft Windows NT installations, and then shows up the results. Follow the instructions that come up to add the Windows installations to the Boot.ini file.
If that doesn't work have some store like microcenter or geek squad re-install your os and see if they can recover any of your files.
