Generally speaking, you can return to normal by restarting the computer.
If you can't get into the system after restarting the computer,
You can force it to shut down and restart,
If you still can't get in, the system file will be lost!
Or there is a serious error in the system memory,
Try to start the computer. After the computer brand is displayed, press F8, press enter, press enter, enter safe mode, and select advanced startup.
Item, configured correctly last time, click to try!
If not, enter the safe mode, and after reaching the desktop, thoroughly kill the virus!
Or unplug the graphics card and memory stick, eraser, brush it again, clean the slot dust, replace the slot, etc!
Restart, if it still doesn't work, you need to "restore with one button" or "reinstall the system"!