45c is ok. Go into the settings or "preferences" and turn off the alarm, or set the alarm temp setting higher. 65c is ok for either the cpu or motherboard.
changing the settings helped the alarming issue but the major problem was the huge cpu fan that wasn't cooling the cpu effectively as the fan is not positioned in the direction of the cpu. I had to dismantle the monster cpu fan with heatsink and screw the fan elsewhere inside the case so that it could position to offer better cooling to the cpu. I guess a simple cpu fan would have been better