Earlier today I upgraded my motherboard. This is the first time I've ever just only replaced the motherboard. Everything powers on fine and works but as soon as I hit the Windows loading screen right before the user login it gives me a blue error screen which I've attached. My monitor responds with 'No Signal' turns black and restarts my computer on a constant loop. My friend and I are thinking it's possibly my hard drive. Or do I have to reformat? I'm really trying to avoid reformatting but if I have to then it can't be helped. Any help is greatly appreciated !