Ya, F the establishment.
I had a Windows update, back in Win7, that would error out while I had my Manjaro HDD plugged in.
The Grub Boot loader was on the Manjaro drive. Apparently, the Win update and Grub did not play well together. Unplugged my Manjaro drive, booted into Win7, update completed without a problem. Plugged Linux drive back in and all was well.