I am having issues with 2 things. Shaders and Fullscreen.

Ill start with Shaders, as its easier to explain.
The simple fact is: My shaders dont work. They refuse to work for me at all. Only 2 work - Default.inc and Inverted.inc....Thats annoying because Shaders look so nice, but arent really important. More annoying than urgent.

My other little annoying problem is with my full screen. I open fullscreen, and it works, but...
Its SIDEWAYS. Its turned counter-clockwise. Thats what makes it so annoying, as im using a desktop computer, and am unsure on how to fix this, and yes I checked all settings. Nothing worked. Please help A.S.A.P., or when you have time.

Thanks,
Zac333.