Hi AnonyMouse-7414,
The only way to resolve this issue fully will be to completely reinstall Windows 10 using a legitimate download and a valid license.
I suggest that you download the Windows 10 ISO from here:
https://www.microsoft.com/en-gb/software-download/windows10ISO
Then use a tool like Rufus to create a bootable USB. Then use a purchased Windows 10 license to activate it legitimately.
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