Omar just use Intel's XTU that I had you download the other day. You can test, monitor, and control everything with one app. And it was made by the manufacturer of the CPU you are using!! Temps don't get nearly as high as IBT, but I've never seen anything make my temps go as high as IBT, so I stick to other simulations like XTU.
OMG you got a BSOD at 4.2GHz @ 1.2v? That can't be right. You want 4.4GHz right? And you have a $100 CPU cooler right? This is what you do, go into BIOS, set multi to 44, set voltage to 1.275, test. Also make sure your vDroop is set appropriately..