ok.
If all that fails a Repair Install would be the next step.
Here is a good guide to that:
Repair Install XP
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1) Boot with the Windows XP CD and at the Setup Screen press the
Enter key
2) You will be taken to the Windows XP Licensing Agreement. After reading the agreement press
F8 to proceed
3) The next screen gives you the option to do a fresh (clean) install or to "
Repair the selected Windows XP installation." Press "
R".
4) Windows XP will copy the necessary files to your Hard Drive to begin the installation and will then reboot. You will see the message that informs you to "
Press any key to boot the CD".
Do Not press any keys this time just wait a few seconds and the Windows Startup Screen will be displayed. Following this you will be greeted by the Windows XP Setup Screens.
5) When Setup has completed you should find all of your previously installed applications and settings are intact.
.................
If more details and precautions are required see this:
http://www.michaelstevenstech.com/XP...install.htm#RI