Clean Your PC's Interior
Open up your tower and clean the inside. Over time, dust will settle inside your PC tower. When this dust covers your CPU cooler or fans, it can decrease their efficiency and reduce airflow in your case. When this happens, your CPU will overheat. Using a can of compressed air, clean the dust out of your PC tower. Make sure to get the fans on the front, back, bottom, and top of your case, as well as the heatsink fans at the top (if you have them).
Scan for Malware
Use antimalware software to quarantine dangerous programs or files. Sometimes, malware can cause our PC to overheat. To fix this issue, use an antimalware software to quarantine and remove viruses and malware from your computer. You can use Windows Defender, which comes with your PC, or you can try a third-party software like Kaspersky, Malwarebytes, or BitDefender.
Check Your Cooling System
Make sure your cooling system is still working. If your cooling system (case fans and CPU heatsink) aren't working properly, this can contribute to your computer overheating. Make sure all of your fans are working, and if not make sure they're plugged into your motherboard fully. Also make sure your CPU heatsink is seated properly on top of the CPU.
Check Your Case Ventilation
Organize your case to increase airflow. If you have a small case with a lot of big components, airflow will be difficult. Make sure to keep the cables in your case organized to ensure there's no issues with airflow. You may also want to consider getting a bigger case if this is a common occurrence for you.
Replace CPU Thermal Paste
Remove the heatsink and put in new thermal paste. If you use too much or too little thermal paste, it can cause the CPU to overheat. If you removed your heatsink for any reason and had to put on thermal paste, check to make sure you put the correct amount. To remove thermal paste, use rubbing alcohol and a tissue or cotton swab to remove it all. Let the CPU and heatsink dry. Then, place a pea-sized drop of thermal paste in the center of the CPU and place the heatsink on top before screwing it back in.
Replace Your CPU and/or Heatsink
Get a new CPU or heatsink.If nothing else works, you may need to replace your CPU or CPU's heatsink. There's a chance one of them is broken, or it always had an issue that never became apparent until now. Make sure to get a CPU and heatsink that fit your motherboard and computer case. If you can repurchase the same CPU and heatsink that your PC had previously, you know those models will work.
Go to a Computer Repair Technician
Contact a local computer repair shop for help. If you have exhausted all other options, a professional computer repair specialist might be able to help. The specialist may be able to diagnose the problem more effectively after seeing your PC in person. To find a computer repair shop, look on your favorite search engine. Look for professional shops that have a number of good reviews, or get suggestions from friends and family for repair shops. If you have a laptop and you're getting the CPU over temperature error, going to a repair shop is the best bet. Laptops are difficult to fix on your own as the parts aren't always the easiest to remove or replace.
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