When the laptop is plugged in, the internet speed will slow down, sometimes for better and sometimes

The power adapter is not good. Filter difference.

For your equipment, this situation is most likely caused by poor network cable contact or poor network cable quality.

Poor contact is mostly due to loose interfaces, and it is recommended to reseat them. If it can't be solved, it is recommended to hold your computer and switch positions with your classmate and test it with his network cable.

You shouldn't be able to buy and hard-to-find cables with a cap of 10mbps.

You can check the adapter status on the Control Panel - Network Connections page.

By the way, your laptop works on when connected to a hotspot on your phone.

Click on it to see if the wireless rate is only 54 Mbps or 72 Mbps and the wired rate is Gbps. (Wired should also have 100 Mbps no matter how bad it is, the RJ45 interface on modern motherboards generally supports Gigabit, if it shows 100 Gigabit, it is recommended to check whether the cable and router support Gigabit, Gigabit transmission requires a network cable with a level not lower than Cat 5E).

Most of the rates displayed in the system interface are theoretical rates.

The theoretical rate is what you can never run.

If your wireless card does not support 6).

Some don't even support 5).

In addition, if there is a load-bearing wall or other barriers between the router and the distance is too far, the signal attenuation will be low, and the delay and packet loss rate will be touching, and the connection will be disconnected from time to time.

Buy a brand new home router now, don't even look at it if it doesn't support wifi 6.

The network cable is generally only on/off, and there are few bad contacts, look at the ** This network cable is pressed by itself, you can see if the metal point at the top of the crystal head is clearly visible, and then this situation is likely to be the campus network fluctuations, it may also be the school's restrictions, it is recommended to let the school maintenance master come to test it, if you really don't want to, you can also take the network cable, just find a computer store, let him help test it, generally don't need money, plug in to test the network cable, but I still think that the probability has nothing to do with the network cable.

The laptop connection network cable is very slow, and the speed may be limited.

External reasons: It may be a problem with the operator, the regional network is relatively poor, you can try to change the network.

If the laptop connection network speed is too slow, it must be because the corresponding network bandwidth is also limited to a certain extent, so he has no way to give a large output to the laptop, depending on how many megabytes of your own network bandwidth, and then change it.

Need to see if your laptop RJ45 interface is Gigabit.

If not, the transfer rate will be reduced.

Do you also need to see if your network cable supports Gigabit? If not, it will also slow down the transfer speed.

First of all. If you come.

The computer has been reinstalled from the system, first check whether the driver of the BAI wireless network card is there.

After unplugging the power supply, there is battery power, and the computer has a high-performance working state to an energy-saving state, at this time, the computer is mainly based on battery life, and no longer blindly pursues high-performance working state, so all the performance has been reduced to reduce energy consumption. This is called slowing down.

It's a strange situation, hehe.

Take a look at the power plan, sometimes plugged in the power plan is balanced by default, the performance of the computer is not the highest, you can change it to high performance yourself, that will improve the performance a little.

I don't know if it's signal interference.