If you are running Windows XP Service Pack 2 or Service Pack 3 and even in what would happen in the implementation of the system if you have to restore the original XP CD it is recently experienced that the exact situation is a lot of Windows update installation. This is because the old CD is does not fixes all the updates that you downloaded over the years. This may take hours or even days to re-download and re-install all the additional things during this period, your PC more vulnerable to viruses and external attacks. (Many of these patches resolve security issues.)
Therefore it would like to know whether there is some way to back up the Windows Service Pack. You can also download the Service Pack if installed directly from an independent company (hereinafter SP3, for example) - but I propose a different solution: pooling.

The process of pooling with your existing Windows XP installation CD-ROM and the latest Service Pack to a new CD. When you're done, you can install the SP3 of Windows XP completely.

This is easier to complete to imagine, as long as you have your original CD and the above-mentioned independent Service Pack. However, I do not want to repeat the details here; Hackett check the Service Pack 2 brings together the old Windows XP CD. Just replace the SP2 and SP3.