Looks like I can't post on OCL forum, also it's not Blender problem, Blender just lead me to realize it. I have crash from running OCL demo in GPU caps also, so Blender is only symptom .
Looks like wipe out all and reinstall is the only way to check it, sadge.
I forgot you need to be Whitelisted in certain Forums such as OpenCL.
NOTE: Before do the last resort you mentioned, Try posting at Developer's Forum first and see what other Users suggests.
Also run in a elevated Command Prompt or Powershell - SFC /scannow . This will at least check your Windows OS for corruption or missing files.
My final thoughts but I am not sure if it's true or not.
GPU Cap utility crash was because I hit demo button when I had a lot of resources used by Blender.
Blender crashes was for different reason.
When I hit render in Blender, OCL creates some kind of a cache (those kernel mentioned before) and if this process is interrupted by canceling render, Blender still thinks this it was created and referring to in on a next try. But it was either not created or corrupted so it either returns an error or crash the whole system.
Once again, it's just thoughts do not quote me on this but for now it's all working.
So in conclusion: all works fine, and looks like it worked fine before reinstall and default driver package has OpenCL. Also there is command in Windows to check OpenCL info clinfo -l (thats' why I am sure now that I have version 2 )
Just installed new drivers.
1st render went well, on second try I also launched OCL demo from GPU caps viewer to emulate stress test.
No bluescreen, but I guess driver crashed and blender hanged out, also my task manager looks like this now
(also no glitches when going to fullscreen on youtube like it was with previous driver, I think it's related)