Teach you to retrieve the security mode under F8 in Win8

In Win8 we will not be able to enter the safe mode by pressing F8 under the boot, which is limited by Win8's new safe boot mechanism. If you want to enter safe mode by pressing F8 at boot, you can do this by following the steps below.

How to retrieve the security mode under F8 in Win8: Start the command prompt as administrator

Enter

bcdedit /set in the open command prompt window {default} bootmenupolicy legacy

Enter OK. After performing this operation, restart the computer and press the F8 key to see the traditional advanced startup options.

If you want to return to the Windows 8 default startup mode, you can do so by entering the following command.

bcdedit /set {default} bootmenupolicy standard