Could you post some more info, like your computer's specs, OS version, what happens exactly when you turn the shaders on, screenshots, etc? I can't really help you when you're being so vague.
My computer specs :
Intel i3 3217U
RAM 2 GB
Intel HD Graphics 4000
Windows 7 Home Premium 32-bit
0
My computer specs :
Intel i3 3217U
RAM 2 GB
Intel HD Graphics 4000
Windows 7 Home Premium 32-bit
0
I use minecraft 1.7.2 version and Optifine HD U D4
My graphics software has been updated, but it still same
What should I do to get better graphics?