|Keep in mind that if you do as StuartS suggests you will need to re-install any programs that didn't come with your computer and download any updates/SPs not included with your original files. You MAY also lose all the files in the My Documents folder. You should assume that will happen. |
You can copy personal files using a number of different methods prior to re-installing WinXP. Knoppix should be able to access your files as can recovery programs.
There are a couple of commands that you could try from the screen you were in before taking the more drastic step of a complete re-install.
Type help at the prompt you were at for a full list of available commands. Look at the link below for more on the repair console.
Additionally I suggest you view the link below for additional information on repair installs.