On the next window click the Restart button and wait for the next screen to appear (just stick with us here, we know this is long). When the full-screen menu appears, select Troubleshooting, then Advanced Options, then Startup Settings. Next hold down the Shift key and click Reboot. To boot into Windows Safe Mode, first click the Start button in Windows 10 and select the Power button as if you were going to reboot, but don’t click anything. Sadly, Microsoft has turned the process of booting into safe mode from a relatively easy process in Windows 7 and Windows 8 to one that is decidedly more complicated in Windows 10.