Now THAT is a good post!!!! Thanks for all the info. It is as if I am sitting in front of your computer!
You are receiving a stop error, 0x0A. You can read about that error and possible causes and resolutions in the Microsoft Knowledge Base article found HERE
. According to this article you may need to do a repair install of XP. Of course, you will need your original Operating System CD that came with the computer (it may say something like Restore CD).
Of course, you can always wipe out the hard drive and do a clean install of XP also, however you will lose all of your data and your settings this way. Another idea is to take your hard drive out of your computer, install it in a different computer as a slave drive, and then you can access it to recover your data before you try either repair option.
If you need more assistance along the way, be sure to come back and ask. When people ask a question in this forum we never know their level of comfort or understanding of how to do these various things, so again, be sure to ask if you need some more clarifacation on any point! Good luck!