Blue screen of death after disabling driver signature verification in Windows 10

[tess7]

Hello everybody,
a month ago my scanner was not working with my notebook. I found out there was an error with driver signature of the scanner in system logs. So I tried to find another one but none of them was working. Even the original from Canon was not working.

So I found this manual https://www.howtogeek.com/167723/how-to-disable-driver-signature-verification-on-64-bit-windows-8.1-so-that-you-can-install-unsigned-drivers/ and disabled the driver signature verification. The problematic scanner started to work properly.

But from that time, everytime I switch on the computer, the blue screen of death occurs.
It helps when I use the process of disabling the signature verification.

I would like to solve this problem forever. I already unistalled the driver of the scanner. But it did not help.

Before setting factory settings, I would like to try another way of repair.

May you help me with that?

Thank you

Tereza