How to Create Windows Repair USB to Fix Boot Problem?

Part 1. Repair MBR from USB using EaseUS Partition Master

If you have no Windows 10 bootable media and don't want to create one, just try to repair MBR using EaseUS Partition Master, a popular third-party disk management tool. It can help you easily repair windows 10 boot problem from USB and get things up and running again.

Download and launch EaseUS Partition Master on another working PC. In the main window,
click Tool and choose "Create WinPE bootable disk".
Then, choose to create a bootable disk on USB, CD/DVD and click "Proceed" to start the process.
When it finished, connect the bootable disk to your corrupted computer and reboot the PC.
Select to boot from EaseUS WinPE bootable disk. It will launch EaseUS Partition Master.
In the main windows of the software, right-click the disk you want to repair, choose Rebuild MBR,
and then choose the proper Operating System version.
Click Apply to save all the changes to fix MBR in Windows.

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If this doesn’t work,

you can also try this program to repair internal Windows system error

with Check partition mode to enable Windows 10 to load again on your PC.

To do it:

Right-click a disk and a partition -> Check partition.

Then follow the wizard to start and complete the disk error checking process.

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Part 2. Create a Recovery Drive from another PC to Repair System

If all the above methods cannot help,

it suggests that the boot problem is caused by other reasons instead of MBR corruption.

Then you should find other solutions to get the problem fixed.

The safest way is to try EaseUS Todo Backup to make a WinPE emergency disk
to backup your important data,
and then create a USB recovery drive from another computer to repair the system.