Officially, Windows Boot Manager (BOOTMGR) is a small piece of software, called a boot manager. BOOTMGR is used to start your Windows 10, Windows 8, Windows 7, or Windows Vista operating system startup. You can select which operating system you would like the Windows to boot in the Boot menu. And also you can set the default boot entry so that the operating system will load what you prefer automatically.
Whereas, there are some other people who believe Boot Manager is a repair tool that helps fix booting issues like booting failure, crash, freeze, black screen of death, or blue screen of death. I am afraid this is a misconception of what boot manager is. Then what to do when Windows 10 won’t boot? What you need is actually a real boot fix tool and I recommend you Tenorshare Boot Genius. Boot Genius is the first PC utility aiming to boot up any PC when Windows 10 crashed, won’t start or get blue screen.
When you dual-boot Windows 10 with an earlier versions of Windows like Windows 8.1, then you have 30 seconds to choose an operating system you wish to boot in before the default operating system runs automatically.
If you want to change the default boot and other boot options, just click Change defaults or choose other options to flip to Options window. Here you can change the timer, choose a default operating system to boot into and choose other operations.
Windows Boot Genius is a comprehensive Windows tool with 4 built-in utilities:
Following are instructions to fix Windows 10 boot issues when you are unable to boot in to Windows 10 successfully.
Before start, please download and install Windows Boot Genius to a workable computer.
Step 1: Firstly you need to create a bootable CD/DVD or USB flash drive. Insert a CD/DVD to CD-ROM drive on PC or connect a USB flash drive to computer. This software is integrated with an ISO file so that you can burn it to the CD/DVD/USB.
Step 2: Insert the burned bootable disk to the Windows 10 that you won’t boot successfully, and set BIOS (UEFI) to boot computer from CD/DVD/USB.
On Windows 10, just follow the steps below to enter BIOS (UEFI) setup.
Step 3: Once the computer boots from bootable disk successfully, you can see main interface of Windows Boot Genius. In Windows Rescue tab, there are Solution Center and Function Center.
If you are a newbie to Windows operating system and do not know the cause of the booting issue. In Solution Center it lists the manifestation of frequently encountered boot problems. Select one that suits your situation, you can follow the detailed instructions display on the right part within the program.
For advanced users, if you know what exactly caused the issue, just go to Function Center and choose corresponding tools to fix the problem.
With Windows Boot Genius, simply designed and with onscreen tips, you can handle any PC boot issues even you are a green hand.
From this article, now we should know that Windows 10 Boot Manager is just a screen that allows you to select an OS to start up. It is not aimed to help when you encounter difficulty to boot in to Windows 10.