My Motherboard, an Asus M3A78-CM, would not allow me to install new OS. My PC has AMD 64,and fully compatible 8gb of PC2-6400 DDR2 240 pin Ram. It would get to the windows logo, stay therefor about 5 mins, and then automatically reboots. What do I have to do to [strike]my motherboard to[/strike] stop this from happening?