If I remember right it's the voltage of your cpu. Are you using a low wattage powersupply? Maby your setup needs more juce
The voltage is around 1.65 or something, right?
Actually, this could just be a setup thing in the program. Maby it's set to warn you if the voltage goes lower then x.xx when your system is supposed to be lower. You should check what the BIOS sais it's set at and then check the configuration of the program. If this happens right away when the program is started I would think this is the reason. If this only happens once in a while then there may be fluctuasions in the voltage in you computer. Maby the monitor is set to sensitive (allows to narrow a change in voltage, there are usually some fluctuasions happening).
This might be the reason for the lockups, if the powersupply isn't stable enough or powerfull enough it may be resulting in lockups. Never know though, might be something else, and this is just there also misleading us to think it is the problem.
Check the settings and stuff before getting a new powersupply or something like that. Maby the lockups have nothing to do with this.
Hope this helps a bit.