I have two Windows partitions; my old W7 partition that I use for upgrade testing etc, and my active W10 LTSB partition. Now I want to remove the old W7 partition and use the space for LTSB. But it holds the boot info and files. When I set it inactive and the LTSB one Active I get the Boot error; NTLDR missing. How can I get my LTSB partition booting correctly - whilst maintaining all programs and files?