avoid using media from high risk sources: for example, from the internet, people you don't know or people who don't have proper anti-virus measures
dylech osgoi defnyddio cyfryngau o ffynonellau risg uchel: er enghraifft, o'r we, gan bobl nad ydych yn eu hadnabod neu bobl nad oes ganddynt fesurau gwrthfeirysol priodol ar waith