Hi Tradesman1. Yes, I select the field or "box" where the voltage shows but the ASUS BIOS will not highlight the box. If you try typing a number after clicking the Vcore voltage box, for example, nothing happens. It is like there is some action you need to take before this voltage box is able to be highlighted. The Vcore voltage has been set already to MANUAL but the BIOS still won't allow me to change the voltage setting. It is the same issue with other voltage settings apart from the Vcore voltage also. I have never struck this issue before on any other motherboard or BIOS. Either I have missed a setting somewhere in the BIOS or it is some kind of bug effecting PS/2 keyboards maybe?