How to enter the safe mode

of the newly installed windows8 system After installing the new system windwos8, mad press F8 or shift+F8 can not enter the safe mode, and want to enter the security mode of windows8, please follow the following graphic tutorial steps, It's easy to get in.
The operation steps are as follows:
1. Add security mode to enter the boot item. Everyone may know that the optimization set master of the Rubik's cube can add the boot entry. Unfortunately, the prompt cannot be used? What should I do?

2. Rubik's Cube directory TweakCube3WinMaster.exe, this is the master of optimization settings. Right click on the operation as shown below and then double-click to use it. Can it be opened?

3. Then follow the operation below to add security mode to enter the boot entry.

4.Win+R, enter msconfig. As shown below