Windows 10: Can't install w10 update, UEFI error?

Thanks for picking up on this. Here's a pix of the entire drive setup.



Should explain: SSD is unused, waiting for "final" version. At the moment C: Is the main drive where Windows 10 is installed. I have a CD ISO of V14332 that I'm trying to install. C: is where I get the error.

 

I still can't tell for sure the C: partition is active but it must be since you are booting to it.

The SSD having an active partition may cause problems if it is listed first in the drive priority order so you need to change the E: partition so it is not active or make sure the SSD is listed as a lower priority than the Windows 7 install drive. Check your Bios for the drive order.

Not sure why you show the Seagate as Active if you did not install to it, but it may be in the same situation as the SSD.

 

I have de-activated the two drives that should not have been active. I'm in the process of burning a bootable CD with the latest Insider ISO. I plan to set the CD drive to boot on startup and (I hope) install a build that will clean up some of the crazy things I have encountered. Thanks so much for supporting me. I may have to get back to you again.