Sorry, I don't know anything about that specifically, but it's safe to say that there are traces of your activities (browsing as well as non-browsing) all over your computer in various caches and files. Take a look at what the browser bundle leaves behind on Windows, and it's designed to leave as little evidence as possible: http://dkn255hz262ypmii.onion/index.php?topic=148291.msg1152452#msg1152452 Most other apps will leave behind a lot more. The best way to avoid leaving evidence is to use a bootable OS like Tails, or you can hide the evidence by fully encrypting your hard drive, but you never know what Windows might transmit back to Microsoft.