41-43 F normal running.
Consider using a dynamic-switching program. It changes your CPU's clock speed depending on the amount of work it needs to do. (As in, the software tells the computer to supply more voltage to the CPU when it needs to work harder, but tells it to cool off when it doesnt have much work.)
Try googling "Notebook Hardware Control" and it'll take you there. It's free and there is a good amount of guidance regarding how to install it.