Retina 2012 15" Macbook Pro: Vertical Lines like dead pixels
Is this only happening when running Windows ? Do you have the same issue when you run MacOS, when your mac boots, or if you are running any other operating system ? It seems like a graphical driver problem. You could maybe try to update your bootcamp drivers if you're using bootcamp. The support of Windows 10 for macbook is very recent so it might be buggy... I had those sorts of problems when running Linux on mac.