1, let's see if it is poisoned first. Although you have reinstalled many systems, if the virus is on the hard disk ... disk, clicking the disk symbol will trigger again after reinstallation. Many viruses are actually infinite loop programs, which directly lead to a sharp increase in the number of processes, an increase in CPU utilization and memory congestion, thus causing system instability and an increase in error rate. Personally, I think the current anti-virus software is basically useless. The best way is to format the hard disk and reinstall the system.
2. If the problem persists, please check the hardware. Personally, the biggest possibility is that your motherboard and graphics card are powered on, and the hard disk does not rule out problems. Because your graphics card is a high-end 8800, the requirements for power supply are very high. Generally, external power supply is used to meet the requirements, that is, the power interface on the graphics card is inserted into the power slot of the motherboard. Do you think you are plugged in? These problems will also occur when the North-South Bridge is hot, but you can't solve them. The most direct and best way is to take the host to the place where you bought it and put it next to the motherboard, hard disk and memory. It's all within the warranty period, so there's no need to spend so much money on trouble until it is replaced. If JS doesn't change it for you, you can call 3 15. As an ordinary person, it is impossible for everyone to be an expert in hardware. If there is a problem, it is too tiring to solve it yourself. Besides, the money you spend is not only for shopping, but also for after-sales service. You can argue wherever you go. I feel sorry for you!