Ok do this - its like mixing music - just set everything to zero and start again.

so you run a .Bat file obviously - set it to just start CGminer and only set intensity – I 18

and tell me what happens - so copy your .bat and just run a vanilla one take out the screwing with the voltage and TH and Sharders - if it works , slowly bring things back until you find the problem.

** you can leve the SET group i.e GPU_MAX_ALLOC_PERCENT=100 etc.