Your hardware will not work without the proper driver installed. Windows 7 will supply some but not all the third-party drivers you need. Those that are missing, you will have to download from your PC manufacturer's website if it's factory-built, or from the motherboard manufacturer's website if the PC was not factory-built.
It's a hybrid I suppose. It was factory built until I put in a new GPU an PSU. The manufacturers website has no motherboard drivers, but the foxconn (makers of the motherboard) supposedly does. No clue if those would work. And how would I install drivers on an operating system that doesn't work yet? Burn the drivers on a CD with a different computer and install through that? And would motherboard drivers be the only thing I would need to get it up and running enough to get other drivers directly?