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4 months agoSo based on the other comments, I would check the cooler and anything else that was above the CPU to see if something got too hot and dribbled solder on the CPU. Also is the socket next to that drop clean, or are there other smaller droplets nearby?
You can check the data the drive itself keeps about disk errors. This data is called SMART.
https://www.howtogeek.com/134735/check-ssd-or-hdd-health-with-smart/
Figure out if the drive is having problems or not, then look at replacing it.
Another thing that slows down old laptops is thermal throttling. Once again there are plenty of programs you can download to check component temperatures. Have you cleaned dust out of the inside of the laptop and re-done the thermal paste?