Installed windows 10, installed chrome, installed zwift, getting my system set up,
did a login of a few websites (not zwift) and saved the passwords on chrome and only chrome.
the only other password was the system password which is different from my browser passwords.
opened Zwift to login and make sure my system was ready to go added my email address and Zwift was able to pull the password from the browser, I reported this to zwift and they informed me that there software only takes passwords from explorer, I did on no occasion open explorer nor save any other passwords other than those saved in chrome and the system password, the system password being different from the password pulled from the system.
to see if I had somehow made a mistake, I reinstalled windows again and then I installed windows 8 and the same happened.
personally i use a graded password, depending on the security of the service I am using, system, financial or not so important web services like Zwift.