Most (if not all) 2011 Macs installed Windows to BIOS boot.
You may have edited the file so that Windows 10 was installed to UEFI boot.
I have downloaded Win 10 ISO from Microsoft site and there was issue with Bootcamp where I have to edit a file to make Bootcamp work for Win 10 version
I have downloaded the Win 10 ISO the from Microsoft website and there was issue with Bootcamp where I have to edit a file to make Bootcamp work for my Win 10 version. I am not sure even what debug info should I provide. I saw the Windows Logo, but after I waited a many hours, nothing happened. I saw that Windows was installed (I completed setup and it finished all installation steps) and then it rebooted. I had some issues earlier, but all of those issues are sorted now.
I have created another partition using bootcamp andfollowed some video how to install on an old macbook. I am trying to install Windows 10 on my MacBook Air Mid 2011.