To access Safe Mode is on what to do in a normal session are as follows:
The drop-down bar at the bottom right corner of the mouse cursor on the right side take “Settings”, click here.
After clicking on the settings (this is important) by pressing the “POWER” button, press the SHIFT key and click the “restart”.
Troubleshoot problems after you select “options” from the “advanced options” screen, then click “Start Settings” is selected.
On this screen you can change the settings related to the Windows 8 displays a list of the initial settings.
Click the “restart” button on the screen on the PC will restart and you will encounter the following screen.
When you see the above screen F1-F9, defined between tasks if you choose “safe mode” F4 opens.