Firstly, i have just finished building my PC and i have looked around the bios. I wasn't sure what to do next, but in my motherboard manual it said to install my OS. I got the disk out but there were not many instructions because i bought it oem, so i just put the disk in when my computer prompted me to put in some media. Its starts to say windows loading files and a gray bar fills up at the bottom. After this the screen goes blank and the cd stops whirring, i've waited ages for something to happen but it doesn't. I have put my cd drive first in boot order followed by my hard drive which are both SATA. Any ideas what i have done wrong?