How to solve the black screen after upgrading win8.1

1, has been upgraded to Win8.1 and appears to start the black screen blue screen, enter the safe mode to uninstall the graphics card driver;

2, then reinstall the correct driver, press and hold the "power button" for about 5 seconds , the system is shut down; press “ power button & rdquo; turn the computer on;

3, repeat the above steps multiple times, the recovery interface appears, select “ advanced recovery options & mdash; & mdash; troubleshooting & rdquo;; >

4, in the advanced options, we can see system restore, system print recovery, automatic repair, command prompt, boot settings and other options, here we choose “ start settings & rdquo;;

5, enter the Win8 system "Startup Settings", we can see the specific description, which includes "Enable security mode". Click the Produce “Restart” button. Select "Enable security mode" or "Enable security mode with network connection";

6. After rebooting into safe mode, right click on the "Start menu" and select "Device Manager" ”;

7. Uninstall Intel and AMD graphics card drivers in Device Manager.

8. After completing the above uninstallation steps, log in to the notebook brand official website to update the win8.1 graphics driver for your model.