If the blue screen suddenly appears on your computer monitor, it is probably because the system has encountered a serious error, leading to the system crash. In this case, your computer will not work properly and you will not be able to use any programs or applications.

Here are some common solutions:

1. Restart the computer

When the blue screen appears, the first step should be to try to restart the computer. This problem can be solved by pressing the power button to turn off the computer and then restart it.

Check the hardware connection

If restarting the computer doesn't solve the problem, you can check your hardware connections to see if all your hardware connections are safe. In particular, check whether the network cable, monitor cable and power cable are connected correctly.

3. Check the driver of the computer

Sometimes, this problem may be caused by your graphics card driver being out of date or damaged. You can check whether there is the latest driver on the website of the graphics card manufacturer and try to update the driver.

Enter safe mode

If the problem persists after restarting the computer, you can try to enter safe mode. This can be accessed by pressing the F8 key when the computer is started.

Seek help from professionals.

If you still can't solve the problem by trying the above methods, you'd better contact professional technicians. They can help you diagnose problems and find solutions.

Generally speaking, blue screen error may be a serious problem, but it can usually be solved by the above methods. When dealing with such problems, please be careful not to try too much to avoid further damage to your equipment.