How to restore Win Xp Pro to factory settings without cd?

[jphelton]

I had to replace my sony laptop's HDD. It originally had windows xp professional. I have no xp pro cd. I have the original key on the bottom of the laptop but can't find it anywhere to dowload it to a cd to install it on the sony. Do I have to buy the software all over again?

 

[Dark Lord of Tech]

https://servicesales.sel.sony.com/ecom/accessories/web/categorySearch.do?operation=subCategorySearch&subCategory=109&category=3&subCategoryName=Recovery%20CD&categoryName=Computer&CSRT=4977254256908434636