Hi again, I'll respect you decicion to do a clean install.

Please make sure that you know what to do before beginning the operation.

Here are a few links that propably help.

Reformatting Windows XP by wng_z3r0
When should I re-format? How should I reinstall?
Windows XP Clean install

Then there are a couple of things you should do immediately after installing Windows and before surfing the net...
  • Install an antivirus and firewall (you should download and have those on a CD or USB drive, all ready to be installed).

    These are good (free) firewalls:
    - Kerio
    - Sygate
    - Outpost

    These are good (free) antiviruses:
    - Antivir
    - Avast
    - AVG
  • Get all Windows updates installed!

Please ask me if you have any questions

Then here are a few things that you can do in order to make your fresh computer more secure: