To Perform full system recovery (All data will be lost) follow these steps

Insert the Support CD and reboot

Your computer should boot off the CD, if not checkout the following guide - How to achieve CD-Rom Support

Now select option 2

Now select your language, using the appropriate key

Now select "1" to begin the recovery/reinstall

Now confirm your decision by hitting "Enter" on the keyboard to continue, remember all data will be lost.

Now type the word "start" and press "Enter" to continue

Windows will now reinstall, this may take some time... Once done reboot and return to your desktop.