Please don't be surprised in your findings.
Before I installed Malwarebytes on my WIN10 computer I got a threatening email form a hacker.
Windows defender did not find any problems, which is very unfortunate because in-fact there was a security problem.
At that point I tried Malwarebytes and Malwarebytes found number of threats.
Also, as you wrote, I also found logs on my laptop with whatever I typed in the past and I also located some txt files in my doc folder and the root C I never created.
The techsupport staff of Malwarebytes was great and recommended tha