問題
Q1
Why my system unable to boot up or boot to Windows after enabled CPU from Core 3 to Core 4 in BIOS?

The Core 3 change to Core 4 function cannot support all AMD CPU(Not all AMD CPU can upgrade from 3 Core CPU to 4 Core CPU). So it might caused system unstable or unable to boot up if CPU not supported. Please Clear CMOS to load default BIOS setting to resolve this problem.