What should I do if the Windows 8 system is blacked out after patching?

After the Windows8 host upgrade patch, there will be a black screen sometimes, the security mode can not enter, you can use the following method to solve
operation steps:
1, boot continuous F8 select security mode, choose to repair your computer, select troubleshooting ;

2, choose to restore the computer;

3, click Next;

4, select the account that needs to be restored;

5, need this time Enter the password;

6, then insert the Windows 8 installation CD or USB flash drive at this time, and wait 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.