It's known, that if someone manages to install their certificate as a trusted certificate on your Windows computer, they can read all you SSl/TLS traffic with man-in-the-middle attack and you won't notice.
Is there a simple practical way of determining, if you have any of those certificates installed? When you look at your certificate store, there are a lot of certificates there, and most of them are legitimate ones. How can one tell which ones are "ok" and which ones may represent a security risk?