If you start Windows 8 with Windows 7 dual, entering Safe Mode with Shift + F8 is a bit difficult. You must run Run msconfig.exe, enable the Safe Boot option, then restart to get a safe boot with both your boot options.
But you don’t have to. The Safe Mode option is already available in several other options. Let’s see where he is!
If you boot your dual boot system with Windows 8 CP by default, you will see this selection screen. As you can see, all these boot options are displayed graphically in Windows 8 –