I got this:
I've a rMBP 2014 and windows 10 with OS X El Capitan, I've done a lot of bcd rebuilds but does not helps...
I this I need to do it from the hidden EFI partition would that mess up with my OS X partition?
This is so far what I've researched in such matter:
http://www.tenforums.com/bsod-crashes-debugging/24959-bsod-boot-0xc0000034.html
https://discussions.apple.com/thread/7531696?tstart=0
I want to be extra sure, don't want to mess up with OS X (which is working fine).

I've a rMBP 2014 and windows 10 with OS X El Capitan, I've done a lot of bcd rebuilds but does not helps...
I this I need to do it from the hidden EFI partition would that mess up with my OS X partition?
This is so far what I've researched in such matter:
http://www.tenforums.com/bsod-crashes-debugging/24959-bsod-boot-0xc0000034.html
https://discussions.apple.com/thread/7531696?tstart=0
I want to be extra sure, don't want to mess up with OS X (which is working fine).