Indual bootmode, you might have installed theMetro BootLoaderof Windows 10.
You are likely to have Windows 7 and/or 8.1 and/or Windows 10 as your OS.
The followingWindows startup settingscan be changed using this option.1.
Enable low-resolution video mode2.
Disable driver signature enforcement6.
Disable early-launch anti-malware protection7.
Disable automatic restart on system failure.
These options are required totroubleshoot your boot problemsor Windows installation.
Once you opt for right options, you should probably do a restart.
When the computer starts again, you have to follow the on-screen instructions.
Total Time:10 minutes
Select Windows 10 in the list of OS.
hit the OS for which you want to change startup options.
Select Windows 10 if you want to configure its startup configs.
Press F8 (if necessary).
tap on Change defaults or choose other options at the bottom.
This option will take you to the screen where there are startup controls of your windows boot manager.
select Choose other options on the next screen.
This screen will show Options screen.
Select Troubleshoot on the next screen
In this screen, you have to grab the Troubleshoot option.
It will be like blank slate again.
select Startup controls in the next screen
This will take you to the Advanced options screen.
You have to select startup parameters to find different options related to it.
In this screen, press Restart.
you might enable or disable different startup prefs in Windows 10, once you restart.
This will prevent boot manager problems.
confirm to set the OS (timer) to more than 10 seconds.
Then, you have time to choose the right OS.
