After a clean install of OS + programs......
The answer is use Norton Ghost image to save an image of you OS + programs to a spare partition. PC user never bother until something like this problem happens.
I can install my Ghost Image back within 15 minutes, that's the complete Win XP + programs. I do it every 3 months just to get back to a clean system again.
I have used Norton Ghost Image for the past 10 years.