Okay so here is the whole situation, 1st i was using windows vista x64 bit until recently i replaced my motherboard seeing as the previous crashed, i bought a gigabyte x58 UD3R and x3 2GB DDR3 memory sticks, with replacing the motherboard i was told i would need to reinstall windows, seeing as that the mother board, hard drive, etc all came together because i bought the computer straight off the factory so with replacing my motherboard and memory i don't have a windows vista x64 bit disk to "reinstall windows" so i just bought windows 7 upgrade disk hoping that i could just instal windows 7 with the upgrade disk. But when i load the disk i click on custom(advanced) installation and the installation begins it completes "expanding files" then installing updates etc then restarts. After my computer restarts it comes right back to the windows 7 installation screen again and ask me to reinstall windows 7 AGAIN.. and this is on going repeating itself over and over and over until my hard drive is full. I just formatted my hard drives to get all my space back but, i want to know why my computer isn't booting windows 7 when it says it's been installed? It seems as if it is only booting off of my CD/DVD drive and i don't know what to do please help!