Material/Lighting Purple Flickering

Hi everyone,

I’m new to Unreal Engine. All my scenes so far has these purple flickering squares all over the place.
Things I noticed is that some lights behave like a mask where the squares are weaker/missing but I think it might be material related, since even the material preview spheres also blink with purple squares.
I really tried all the basic stuff, reinstalling drivers, unreal versions, messing around on rendering pallete, materials. I also tried to dig on foruns and youtube for someone with the same problem. All people I know that has some UE knowledge could’nt tell what is it.
It happens on any blank and custom scene. My video card is a RTX 3070.

Really appreciate if someone could help me on this issue.

Thanks!

![light|690x480](upload://9WpG66JIGU


m6QCCwXDP6CeQRDXL.jpeg)