I am concerned if I have a security problem. After I start my computer lately, I notice along the top of the scree a few kanji characters that expand til they extend across the top of the computer screen. They obliterate the info on the tabs so that closing the tab(s) becomes impossible. I don't know what or why this is happening. Does anyone else know what is going on and/or why this is happening. I worry that it is an indication of a virus or foreign activity focusing on me, my computer or something else that I have not considered.