Windows 7 Windows Vista BSOD

Hi, I have recently been using Vista (RC2 Build 5744) pretty often on my main PC, it has actually been very good and hasn't given me any problems until recently. I just upgraded my computer (motherboard, RAM, video card and processor) and now Vista won't boot. It gives me a Blue Screen and tells me to try scanning for viruses and remove any newly installed hard drives. Also, it has the Stop Error: 0x0000007B. I did do a few googles of this and nothing came up to help me out. I have attempted to run the Vista Repair option on the install CD and have had no luck. Is there any way I can simply reinstall Vista without losing any of my data? Or am I going to have to do a complete format and fresh install of the OS? Thanks for you time.