9] Overheating
The central processing unit (CPU) is usually equipped with a fan to keep it cool. If the fan is not working or if the CPU is old, then the CPU will overheat and cause a certain error called kernel error. This is a common problem with chips that have been overclocked to operate at higher speeds than they should.
One solution is to buy a bigger and better fan and install it on top of the CPU.
10] Power supply problems
Power surges can damage a computer just like in a power outage. If this happens frequently, consider purchasing an uninterruptible power supply (UPS). This will give you a clean power supply when there is power and will give you time to turn off the computer in case of a power outage.
This is a good investment if your data is critical, as a power outage will cause unsaved data to be lost.