Weird shading on all materials/assets

I was having so trouble with decals, I decided to follow this.

It helped my issue, but when I reloaded the project all my textures were low res and very blurry.

I’ve since reverted the changes I made and reloaded but my textures are still low res and blurry.

I started up a new project to see if it was just my project issue, but upon starting it, the starter content also had shading issues.

I reinstalled and the issue is still there.

Maybe try double-clicking the textures and check the ‘Never Stream’ on the sidebar to the right in the Texture Editor window?

I realise this isn’t ideal for memory conservation, but check if it loads the hi-res textures after you check that box and save changes.