How to disable driver signature verification when installing OS?

Question

Windows

when installing a not quite licensed windows 7 on one of the OSes, at the stage of selecting the OSes from the BIOS for further installation, it gives an error - "Unable to verify the digital signatures of the drivers".

Answer 1

1 - legacy bios does not check driver signatures
2 - 7ka does not support UEFI
3 - for all assembly tricks - to their authors

Answer 2

Throw out the nafig assembly and install it from the official distribution.

Answer 3

when installing not quite licensed windows 7

What difference does it make if you have a license or not? It definitely won't affect the installation.

gives an error message

Probably the assembly curve. Use distributions from the developer, and if you do builds, do them carefully and wisely.