|This could be predominantly due to overheating. However, please provide more details so that we can help you with better solution.|
Make and model number of your laptop
Year of purchase
Do you restart the laptop at least once in a day ?
Have you done all windows updates regularly?
Was there any power surge in your area recently?
Make of the antivirus? Is it updated with latest patches?
Solution 1: (If the laptop is under warranty opening the laptop will make warranty void)
Open the laptop case, so you can access the CPU fan and the heatsink. In some cases you can access the heatsink through the latch on the bottom of the laptop. Sometimes you have to open the laptop case all the way down.
Carefully disconnect the fan cables on the system board and remove the fan. If the fan makes unusual sound when it spins (grinding sound), I would recommend to replace the fan.
Clean the fan and the heatsink with compressed air.
I would also recommend removing old thermal grease from the CPU and applying new grease for better heat conductivity.