Does windows 10 Nov update work better with Grub2 installed? When the original release came out, it did the upgrade but when almost completed it rolled back. The workaround I did, was to restore windows 7 boot using bootrec /fixboot and bootrec /fixmbr from a windows 7 repair disk. Installed windows 10, let it update, then reboot. I reinstalled grub. Then it was working. My concern is future releases, since they get automatically downloaded.