How does Win8 solve the problem of black screen after patching

The method of Win8 to solve the problem of black screen after patching is as follows:
After Windows8 host upgrade patch, there will be a black screen sometimes, and the security mode cannot be entered. You can use the following method to solve it:
1, boot continuously F8 select security mode Then choose to repair your computer and choose to troubleshoot.

2, choose to restore the computer.

3. Click Next.

4. Select the account that needs to be restored.

5, you need to enter a password at this time.

6, then insert the Windows 8 installation CD or U disk at this time, waiting for the repair to complete.

Remarks:
When the user's host can enter the safe mode normally, you can refer to the knowledge base 077382, enter the security mode setting, and then uninstall the previously updated patch, the problem is solved.