i believe you have seen the blue screen of death. and i doubt you will be able to repair it. if you can whipe it and start over with windows it would tell you if it worst then that. i bet you need a new HD
I'd suggest booting to recovery console and just try running fixmbr, but if you don't have the XP cd, that might prove difficult.
Bart's PE is great. I used it this weekend to recover some data off my dad's work laptop that wasn't booting into windows (no BSOD, no errors, just hanging up during boot. Dirty install didn't help, and after recovering data, it got stuck at 56% on a full format. So I've got Dell shipping out a new drive.)
But... you'll need the XP cd for that as well. And a working computer to install the pebuilder application.
So yeah, your best bet is buy an XP cd, and a new hdd. Install xp to the new drive, and see if you can access your old drive from the new installation, and backup your data before wiping that old drive.
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The second parameter (the numbers and letters inside the parenthesis) is the status code telling why the volume failed to mount. Can you get that stop code for me? I might be able to tell you what exactly happened. However, in most cases it is time to rebuild because the disk is dying or dead.