I think its the cpu overheating by the bios readout 60c is pretty hot, did you check for dust? You may have to remove the heatsink and clean then reinstall new thermal paste. Some cheaper paste gets hard over time and needs to be removed and replace so if you do this get Artic silver5 and artic cleaner and follow the instructions on thier website.
Start with these things and then post back if the problem continues there are other things to check
Rick