Hi,
Apologize for the late reply.
This error indicates a failure to boot Windows 10 occurred during the final parts of the update, causing the system to roll back to Windows 7. The most likely cause of this error is an incompatible driver or hardware defect. Unfortunately, due to the timing of this failure, there are often no logs, crash dumps or other diagnostic information available to investigate the issue easily, which makes it difficult to determine which, if any, of the drivers or system components are causing the update to fail.
Also make sure you have enough disk space, at least 25 to 30 GBs of disk space.
Follow these articles:
How to: 10 Tips before installing the latest Windows 10 build
How to: 10 things to do if Windows 10 Setup fails.
Let us know the result.