After looking at that pic of Ms. Alba, the blood is rapidly heading away from my brain!! Disconnect everything from that new build except the video card, HD, mouse and keyboard. Boot into windows and see if the system continues to hang. If not then start adding periperals, DVD, PCi cards ect., one at a time till it hangs up. Then you need to evaluate that specific piece of hardware or it's drivers. Without knowing the specs of that system, we may not get very far!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.