This blue screen thing was driving me nutts!! I know this post hasn't been updated in a while but if any other poor saps stumble upon this post after rigorous hours of Google searching, then let me giv you the answer to you Minecraft "blues"... pause for drama...
the shader files you installed into your "shaderpacks" are probably a .zip file because everything else you put in minecraft is a .zip file... !
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the shader files you installed into your "shaderpacks" are probably a .zip file because everything else you put in minecraft is a .zip file... !
UNZIP THEM!
Tadah!