Periodically I get a load of rubbish (see pics) appear on my screen while playing. It is not in any language I recognise and sometimes obscures half my screen. It does not appear to be game related as it does not show in the journal. It can take minutes to dissolve and is a damn nuisance. Does anyone know how or where it originates and/or how to stop it?. Below is a close up of the letters, it means nothing to me. So as I said any ideas?.