|How did you determine it is a pirated copy?|
I frequently get Dell systems for OS reinstall and the user does not have the disks. All it takes to install is any OEM XP disk matching the version on the COA sticker on the case (Home, Pro). During the reinstall process the non-Dell setup will ask for the license key. The one on the sticker is used and should be able to activate it on the Microsoft site.
Once Windows is up and running the hardware drivers are next.
Using the STAG on the sticker you go to the Dell site and download the drivers for all your hardware including the chipset.