How to Monitor Your Computer's CPU Temperature and start with the "For Basic CPU Temperature Monitoring: Core Temp" section. Set it to startup with Windows and let it run for a few days, (especially while gaming), so it'll build a history of CPU temps. If it stays well below (10-20°C below) the "Tj.Max" reading for your CPU, then your CPU temps are fine.
If it is regularly overheating though, "there's probably a deeper cause that you need to look into. Open up the Task Manager and see if there are any processes using your CPU, and stop them (or figure out why they're out of control). Make sure that you aren't blocking any of the vents on your computer, especially if it's a laptop. Blow the vents out with compressed air to make sure they aren't filled with dust and dirt. The older and dirtier a computer gets, the harder the fans have to work to keep the temperature down-which means a hot computer and very loud fans."
Also keep in mind that computers are designed to shutdown when they overheat so they do not cause a potentially disastrous fire.
If it is regularly overheating though, "there's probably a deeper cause that you need to look into. Open up the Task Manager and see if there are any processes using your CPU, and stop them (or figure out why they're out of control). Make sure that you aren't blocking any of the vents on your computer, especially if it's a laptop. Blow the vents out with compressed air to make sure they aren't filled with dust and dirt. The older and dirtier a computer gets, the harder the fans have to work to keep the temperature down-which means a hot computer and very loud fans."
Also keep in mind that computers are designed to shutdown when they overheat so they do not cause a potentially disastrous fire.