Why Am I Getting Reflection And Light Popping?

So I’ve been using the engine for a few days now, but have found I’m getting constant Lighting and Reflection Artefacts. I haven’t once had a stable clean scene, and I’m using the example projects so why are they turning out like this?

Follow the this link to see what I mean.

Cheers

Its the nvidia beta drivers 340.43
Back your drivers to 337

The word “legend” comes to mind. Thank you very much for that.

Not legend just try not to use beta drivers while developing. It’s not normally an issue but it happens.