It worked for me! Thank you! :)
I updated firmware and bios first, but that didn't help.
I downloaded drivers from site and installed them as suggested.
Then I tried to locate ftdibus.sys and found two instances in different folders in C:\Windows\System32\DriverStore , but didn't risk to move them.
I waited a while and rebooted but the error was still there. But then I hit checkbox saying like "do not notify me" and the error was gone.
After that I installed latest Microsoft update and when it was done I went to settings and was finaly able to switch toggle 'Memory integrity' ON!
Yet I seem to do a lot of movents, but I think that the installing a proper driver was the only thing that did solve the issue, the rest were done by the system itself.