How does the Win8.1 system enter advanced startup options?
1. Move the mouse to the lower right corner, open settings, then hold down the keyboard shift key while the left mouse button click on the Power button in the shortcut below, pop-up options, select Reboot, and then the system will automatically enter the Advanced Options menu, as shown in the following figure.
2. Or move the mouse to the lower right corner, open the settings, then click "Change Computer Settings" and then tap into the "Update and restore" option (here and Win8, Win8 is to go to the "General" option), click "Restore", on the right side can see "Advanced Boot", click to restart immediately below the line, The system then automatically enters the Advanced Options menu.
Enter the advanced Options menu, if you want to enter Safe mode, in turn: Troubleshoot > Advanced options > Startup settings > Click Enable Safe Mode, then the system will automatically enter Safe mode,