Strange fuzzy lines around edges

[Autumn N]

There are these strange fuzzy lines around the edges of everything in Illustrator.

It happens with text, shapes, lines, everything vector.

Any ideas how to make this stop?

[Cari Jansen · Accepted solution]

Try disabling GPU Performance and see if it makes a difference.

1. Click GPU performance icon in Application bar to open GPU Performance preferences
2. Deselect GPU Performance