Recent install on this mobo, with new cpu, corsair ram, etc. When trying to copy something, or delete, the screen flashes / pulses. Not sure how else to describe it, but never seen anything like that before. A single flash every time, eg when I delete something from the desktop.

Makes me nervous.

Have multiple machines, all self built, so am used to tech issues, but this is a first. Don't know if mobo related, but seems hardware related somehow. Have latest BIOS AFAIK.