Hi;
HP Pro 3500 is supporting the following O/S:
Preinstalled
Windows 8 Pro (64-bit)*
Windows 8 (64-bit)*
Windows® 7 Ultimate (32-bit or 64-bit)**
Windows® 7 Professional (32-bit or 64-bit)**
Windows® 7 Home Premium (32-bit or 64-bit)**
Windows® 7 Home Basic (64-bit)**
Windows® Starter (32-bit)***
FreeDOS 2.0
FreeLnx
Sorry it's not included with windows XP.
Best Regards;