So I just got a new PC and installed windows 7 on it. After using it for less than a day, after installing graphics cards drivers and other things, I updated my computer. The only problem now is that it won't boot to the OS, it flashes the gigabyte screen then restarts and repeats this, someone please help ASAP, specs: i5 4670k, GTX 750 Ti, 6gb RAM, B85 HD3 motherboard from gigabyte and yes the OS/hard drive is selected as the priority in the BIOS.