Enable F8 Safe Mode Boot Menu

 Windows 10 offers fantastic boot methods compared to some earlier operating systems, but sometimes You may need to restart Your computer in safe mode.
 Also there is many ways, how to do that. But sometimes You cannot use them, because Your pc simply freezes up or don't run in normal mode. So You need try some other method, for example boot in safe mode or in safe mode with networking.
But the opportunity to access the F8 boot menu is removed.
This boot options menu allows you to enter safe mode or access other recovery tools that would otherwise only be available after booting in to Windows or using recovery media (i.e the install disc).
 If you think that you may need to enter safe mode when Windows is no longer able to boot, you can sacrifice a couple of seconds at boot and enable the F8 safe mode menu.
 There is many opportunities, how to restore this F8 function, but I do not want to retell about them. You can read it using links, what You can find below.

• I wanted simplify this procedure. So here is two simple scripts - bat or cmd files.
• Simply download and unzip to desktop or somewhere else. To setup F8 new function, siply right click on file "SafeMode_F8.bat" and "Run as administrator".  Your computer will restart and after restart this mode is activated.
• If You want to restore default options click with mouse right button on file "SafeMode_Default.bat", your pc restarts and everything is restored as they were before.

(If You use UAC, then may be needed turn it off before to run given files. After restart  turn UAC on again, if You desire.)

• Use: The computer during startup, press the F8 key repeatedly until you hear a beep.

 Download: attached file from nsaneforums (You must be loged in) or from datafilehost (free download)

Site: https://www.datafilehost.com/d/d761388f
or
Click to download

How to do everything manually and more...