Microsoft Store cuts $100 off any Surface Pro 2 or select Windows 8 PCs over $599 when you purchase online using a Windows XP device. (In-store customers must present a qualifying Windows XP device during purchase.) You will also receive 90-days of free support and free data transfer. The offer is not valid for users currently running Windows 8. (Support and security updates for Windows XP will no longer be available after today, April 8.)