Select Windows 7 64-bit from the Operating System dropdown menu.
The foundation. It helps Windows identify the motherboard components.
The chipset driver allows Windows 7 to correctly manage PCI buses, USB controllers, and power management.
from the OS dropdown.
If possible, upgrade the single SODIMM slot to a 2GB DDR2 module.
This is the biggest hurdle. Intel never officially released a Windows 7 64-bit driver for the GMA 3150. But a modified driver exists.