Black lines across my “send/receive”. Am i hacked?

I have never had black lines run across when I click on "details" in "send/receive" Outlook emails. Someone has been sending me phoney emails from a few different people that I know and this started at the same time as the black lines. Does this mean that they are copying my address book? what are the black lines? Anyone have experience or knowledge about this? I have Norton. Thank you.