Just caught up now. Two things: First, i would advise against a recording device as it may be illegal in your state. I think some are forgetting that is if it is found by the H, that would cause all sorts of problems. The reason I say this is unless someone is out to get him him, then all fingers will most likely be pointed in one direction. Also, if this thread is found and that advice is remembered, well you get the pic...
Second, as far as that person and other stuff popping up on your browser, just go into the internet options and delete the cookies, browsing history, etc. that stuff won't pop up any more...
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.