I am looking for the way how to set up the my environments as I need more than one OS at once. I care about privacy and securities the most, that is my priority. But I can't refuse Windows in full. Because of that I need to know if Windows logs activities of other OS runned on same hardware ? Is there any way to run exploit under Windows that would get some informations about activities or data saved while the other OS was runned on same hardware ?
I want to ask about such a scenarios:
A. Let's say I have linux distribution as well as Windows normally installed on one physical disk.
B. What if I have just Windows installed on physical disk and have Virtual Box or similar application with Linux distribution powered ?
C. Is there a way if I power on Linux distribution from USB live or better – live cd ? Lets say I have Windows installed normally and I run Tails from Live CD. However if still secure I would prefer to run some more casual distribution of Linux rather than Tails.
Is it only good solution to have 2 different computers for different OS to be sure Windows and some online activity would not take ANY piece of important data operated on linux with little online activity involved ?