Boot Camp 6 update won't install on Windows 10 Using Apple Software Update gets an installer error when trying to update Boot Camp from 5.1 to 6.0 on a MacBook Pro retina laptop running Windows 10. Also tried downloading the Boot Camp drivers directly from Boot Camp Assistant and get the same errors (see screenshot). 

The first error is an installer error; if I click Close the program, then I see and empty error message. 

Any idea how to resolve this?
It has been a while sine I tried this so my apologies if it is a little vague... But the actual Windows drivers are inside the BootCamp package. In a zip file if memory serves.

Right-click on the bootcamp app and look for the drivers zip file (should be obvious which one it is.) and copy it out.

Put it in a place that your Win 10 installation can see it, boot into windows, copy the file over, open it up and install the drivers. One at a time if necessary in Windows.