Originally Posted by
PatrickGSR94
Seems a little weird that the flash mode of the light causes all that interference but the light on steady does not.
Well, a flashing light involves a current that keeps changing, whereas one that's constantly on is powered by a steady current. You need a variation in the primary current to induce a secondary current in another conductor that's not connected electrically to the first one. The primary conductor is in the light in this case, and the secondary one is in the computer.