It's about time that we bade farewell to Windows XP and Windows Vista. Microsoft has already discontinued supports for these old operating systems, Mozilla did likewise couple of months prior. Presently, Apple discharge a security update on the 25th of May which anticipate PCs running on Microsoft Windows XP, Vista, and those on Apple 1st generation units from using the iTunes Store..
source
As indicated by Apple, "On the off chance that you have a Windows XP or Vista PC, your PC is never again upheld by Microsoft and you're not ready to utilize the most recent form of iTunes." However, past adaptations of iTunes which needs bolster from Apple can in any case be gotten to by clients of these OS.
With this, you won't have the capacity to make new purchases from the iTunes Store nor redownload past purchases on their PC. Windows 7 or later will be required after May 25 to empower you make purchases with the most recent form of iTunes.