Hello Romaneus,
We understand your concern in this regard.
I guess you may need to go with registry changes to fix this issue. Which is actually not recommended.
Modifying REGISTRY settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from
the configuring of REGISTRY settings can be solved.
Suggest to try performing a
repair In-place upgrade. A repair In-place upgrade will repair operating system files while preserving your personal files, settings and installed applications.
We recommend you to take a Backup of personal and important files in both cases to avoid unwanted situations.
How
to: perform a repair upgrade using the Windows 10 ISO file
Note:
If you’ve already successful activated Windows 10 on this PC, including if you upgraded by taking advantage of the free upgrade offer you won't need to enter a Windows 10 product
key. You can skip the product key page by selecting the Skip button. Your PC will automatically activate later.
Keep us posted if you require further assistance.