The Open Hardware Monitor is a free open source tool to monitor your computer’s sensors shedding details on CPU (Central Processing Unit) temperature, fan speed, voltages, load and clock speeds, the software can be run in portable mode and doesn’t need installation, only administrator rights.
An overheated CPU can result in unexplained system crashes and reboots, a modern computer will shut down before your CPU burns but it won’t let you know why. Luckily all computer processors carry sensor monitoring. Their maximum temperature will depend on brand and model, it can be found written on its body or help manual if you bought the CPU separately and installed it yourself, the only other way to find out a CPU maximum running temperature is to check the manufacturer’s website.
If you notice your CPU is overheating make sure to clean all dirt and dust from the fan vents, place the computer in a ventilated room/space with nothing obstructing the airflow (e.g. wall close to the vents), enhance case airflow adding more or better fans and double check that fans run as they should at the correct RPM (Revolutions Per Minute). Unless your computer comes fitted with wide cooling capacity, probably not the budget laptops, during the hottest Summer days while running high load applications like games and graphic or video editors will inevitably overheat the computer with the only viable solution being finding an air conditioned room,
Open Hardware Monitor supports all the latest processors (Intel Core 2, Core i3/i5/i7, Sandy Bridge, Ivy Bridge and AMD), GPU sensors for Nvidia and ATI/AMD, hard drives SMART sensors and SSD wear levelling as well as reading fan controllers. Data reads are published to the Windows Management Instrumentation allowing other applications to display and make use of the information.