Good. I remember having a very similar problem with the windows firewall before, and a repair install (not
a reformat, was able to fix it. As you have the installation discs, it looks like a good option to try. Firstly you need make your PC start from the CD-ROM drive. Make sure you know which drive the CD's go into, ie D:\ etc
Put the XP CD into the drive now.
Turn on the computer.
Press and hold the Delete
key as soon as the computer starts, to display the CMOS start-up screen.
Use the arrow keys to highlight BIOS Features Setup, and press Enter.
Press the down arrow to move to the Boot Sequence field.
Press Page Up or Page Down to display the desired boot sequence.
Press Esc to exit the screen.
Highlight Save & Exit Setup, then press Enter.
The new boot sequence is saved and the computer restarts.
When the Press any key to boot from CD message is displayed on your screen, press a key to start your computer from the Windows XP CD.
Press ENTER when you see the message To setup Windows XP now, and then press enter
displayed on the Welcome to Setup screen.
Do not choose the option to press R to use the Recovery Console.
In the Windows XP Licensing Agreement, press F8 to agree to the license agreement.
Make sure that your current installation of Windows XP is selected in the box, and then press R
to repair Windows XP.
Follow the instructions on the screen to complete Setup.
Let me know how it goes..