It's not up to you to make mistakes in buying a new computer. You have to go through the after-sales inspection. Buying used computers in these places is just an opportunity. Some of them trade in the same city. I sold dozens of things on leisure fishing nets. If I can't make it clear here, I can't return it. I have to take the risk.

After talking about quality problems, hardware problems and soft faults caused by your incorrect operation, you think there is something wrong with the computer, not a fault.