Axon image problems

Hello,

I am currently running two axons, one for a Christie projector and the other for an LED wall.

I have noticed on the projector that there are artifacts appearing like triangles and other shapes.

When I see these I reboot the Axon but they come right back. It is not all the time and not always at the same spots...

Also the other night I was surprised to see the windows 'blue screen of death' projected all over the stage instead of the show content.

Any advice?