Basically as the title says. The shaders used to work fine but after not playin for about 2 months, they decide to not work at all. When in Minimum, it acts as it should. When you switch it to Low-Max, the shaders look as if they are on "Off." I would like it if someone could help we with this, thanks in advance!
-Pc Specs-
Intel I7-4700MQ 2.40GHz
NVIDIA GeForce GT740m
12.0 GB RAM
64-Bit Windows 8.1

The settings when it is on "off"

The settings when it is on "Minimum"

The settings when it is on "Low" or higher.