Recently I was trying to install Windows 7 on a custom built system with an asus m2n-sli deluxe motherboard. When running through the Windows 7 Setup , the screen would stay on the “Starting Windows” screen and then eventually come back with a Blue Screen with the Error machine check exception. I tried different power supplys , windows disks and memory. Eventually I found machine check exception is in fact an issue with the processor speaking to the memory. I increased the CPU voltage from 1.41 volts to 1.51 and increased the DDR2 memory to 1.9v and Windows 7 setup went through fine!