The System Configuration tool built into Windows gives you the ability to enable a “safe boot” option. This essentially forces Windows to boot into Safe Mode every time you restart your PC. To start Windows normally again, you have to go back into the System Configuration tool and disable the option.

To start it :
Go to search bar at the bottom left of your Screen.
Type run
Once Run Launches type on it msconfig and press enter

Figure 1

You can even choose the type of Safe Mode into which you want Windows to start:

Minimal: normal Safe Mode
Alternate shell: Safe Mode using only the Command Prompt
Active Directory repair: Used only for repairing an Active Directory server
Network: Safe Mode with networking support

This alternative method provides a great way to boot into Safe Mode repeatedly when you need to.
Note : to disable it simply uncheck safe boot on , seen on figure 1.