Ah, your problem isn't related to service packs, it's related to the media source.To reinstall an OEM version of Windows, you should use installation media provided by the manufacturer, or else generic OEM media if you don't have the original. Note: If you're viewing the Classic View of Control Panel, you won't see this link.However, sticker indicates that it is OEM XP Pro, and the media is off the shelf XP.
Follow the steps below to activate windows XP make your windows XP genuine without using the product key. If you are installing(or reinstalling) windows XP professional you might face a problem of the Windows XP product key, it may not be genuine or may no more in use.So now you do not need to purchase a new product key from Microsoft.You can still use an off-the-shelf disk, but you will need to call the activation hotline and activate manually by phone for that to work; you cannot do automatic internet activation if your key doesn't match the media being used. Simply double-click on the System icon and proceed to Step 4.3) In the Performance and Maintenance window, click on the System Control Panel icon at the bottom of the window.
How-To: Find Windows XP Product Key from the Windows XP CD: 1) Insert Windows XP cd into a working computer. 3) Open “My Computer” 4) Right Click on the Windows XP cd-rom drive and select explore. 7) Open Your CD’s product key is contained within the file.