windows 10 safe mode on startup
1. Run Command Prompt as Administrator
2. Copy and paste this command then press Enter:
bcdedit /set {default} bootmenupolicy legacy
3. Reboot your PC
4. Before anything appears on your screen, press F8 repeatedly until the
Boot Options menu is displayed. Then select 'Safe Mode'
5. Your PC should now boot into Windows Safe Mode. If you want to exit, just
restart your PC and by default, normal Windows should boot.