I am having a problem installing Windows 7 64 bit on my computer. I have already installed it once, but my discs would not fit in my old box. So I bought a new box, with a 1080 watt power supply. It is a Foxcomm A7GM M/B with 8 GByte of memory. It comes up with a Service Pack 1 install, then when I do a custom install, when I format each drive, the system says that it won't install the system. I have installed many XP systems, on a number of platforms. I have been playing with computers for 30 years or so.