What went wrong with the computer?

There are many reasons for the abnormal sound of the fan.

1.If the computer is used for a long time (more than 1 year) and the dust in the case is not cleaned, there will be a lot of dust sticking to the CPU fan, and worse, dust will enter the motor bearing of the fan, which will cause the fan to make a lot of noise.

2.Most motherboards have the function of automatically adjusting the fan speed according to the temperature of the CPU, and the temperature is low in winter, so it is possible that the fan speed is low when it is first turned on, and the sound will be louder.

3.Some brands of computers are born defects, and one of my sister's brand machines is, every time you turn on (you haven't entered the system, you just press the power button) and it rings twice like a motorcycle banging the accelerator, and then it's fine, but this is generally very regular, every time you turn on the machine rings, each time it's two.

4.If your computer doesn't sound like anything when it enters the desktop, it's possible that a program (Trojan horse, startup item, background program) is causing the CPU usage to increase for a short period of time, and the temperature will also increase, and the fan speed will also increase.

It is recommended to use software such as Master Lu to monitor the temperature of the CPU to see if it is normal. When you hear a strange sound again, open the Task Manager, Process tab, see if there is a process with high CPU usage, and then go online to confirm what kind of program that process is and then deal with it accordingly.

As for the slow shutdown, I don't know what configuration your machine is, the more likely reason is.

1.There are too many background services and background runners, and it takes a long time to end them when you shut them down.

2.If the size of the virtual memory is set unreasonable (normally it should be 2 times of the physical memory), and the partition of the virtual memory is selected in the C drive, you know, the read and write speed of the hard disk is much lower than the memory. Web pages and some programs will occupy virtual memory, and the shutdown will be slow in order to empty the virtual memory.

3.Processes of viruses, Trojans and other programs run in the background.

4.The shutdown program encountered an error when ending some processes, resulting in the failure to end the process.

It is recommended to use Optimizer or similar software to automatically optimize the system settings and thoroughly detect and kill viruses.

If it still doesn't work, reinstall the system with an official installation disk (not ghost or other unofficial versions), and take optimization and security measures.

The CPU is overheating, you take it apart and touch it to see if it's okay.

The reason for the loud sound: mainly because the weather is cold, the lubricating oil in the fan shaft is thicker, the fan speed can not run, it is easy to resonate when the speed is slow, all the sound is louder, and the computer has been running for a period of time after restarting and it will return to normal.

There are 2 possibilities for slow shutdown.

1 It is related to the computer configuration I don't know what configuration you have.

2 There may be small viruses and small Trojans It is recommended to check and kill them.

Hope mine is helpful to you.

Take an eraser to erase the memory module.