For users with Win 8 system, press and hold the keys SHIFT and F8 during boot.
This will allow users to enter recovery mode your system Win 8.
Go to Advanced Options >> Advanced >> Troubleshoot Options.
Choose Windows Startup Settings >> Restart to restart the system so that users can have the option to boot into safe mode.
To access Safe Mode in Windows itself, press the Windows key + R to open the dialog and Write msconfig , then choose Boot and then the option Safe Boot .