Solution: First use the general repair method:
First, try to repair the operating system:
Method 1. Press F8 key continuously to enter the system operation menu (if it is Win8, Win8. 1, Win 10 system, press the power button to turn it off after seeing the boot screen, and repeat it for about three times in a short time to enter WinRE.
{Windows
Restore the environment}, but some users may need to disconnect the power directly. So the advanced recovery interface should appear after booting), select "Last Correct Configuration" and restart the computer to see if it can be solved.
Method 2: Press F8 key continuously to enter the system operation menu (in the case of WIN8, WIN8. 1, WIN 10 systems, press and hold the power button to turn it off after seeing the boot screen, and then you can enter WinRE after repeating it for about three times in a short time.
{Windows
Restore the environment}, but some users may need to disconnect the power directly. Then, look for "safe mode" and enter "safe mode". If you can successfully enter, click Start, all programs, accessories, system tools, system restore, open the system restore dialog box, and select "Restore my computer to an earlier time".
In this way, you can use the system restore function of Windows system to restore to the restore point where you can boot normally before. (If any)
Method three. Try electrostatic discharge treatment. Unplug the power cord and battery of the computer after shutdown; Press and hold the power button for more than 30 seconds, and then try to restart.
Method four. Install the CD or USB flash drive with the system, insert the CD-ROM drive or USB interface, restart the computer, and enter the CD-ROM installation system state or USB flash drive installation system state. After the startup interface flashes, do not choose to install the system, but choose to repair the current system (it may run for a long time, 2-4 hours), and wait patiently for the repair to be completed to see if the problem can be solved. (At the end of this paper, the method of setting U disk as the first boot sequence device is described in detail. )
If the above four methods are ineffective, you can only reinstall the system.