MSI Special BIOS for for AMD 3 core to 4 core

[brigs]

I have Vista 64bit and i can lock up my 550BE to B50 X4, but just before when it´s time to loggin in Windows my computer restart. Why??
I have try to raise CPU, CPU-NB and HT volt, but it will not work.
In Windows XP 32bit it´s work fine but it not stabe yet.

Maybe you got defect CPU, i mean unlockable but not 100% stable in windows, try lowering HT, CPU-NB or CPU multi maybe it can help. Vista 64bit is more sensitive than 32bit windows for error faulties.