Windows XP Service Pack 3 (SP3) was Microsoft's final major update for the 32-bit OS, while the 64-bit version only reached SP2 and is less common. As support ended on April 8, 2014, downloading these ISOs poses high security risks, making them suitable only for isolated virtual machines, retro gaming, or legacy software. For secure usage, it is recommended to run the system in a virtualized environment without internet access.