Windows 10: Wipe a dual boot machine and reinstall Win 10?

I have an old machine that started out on Win 7. I updated/upgraded over the years and it now has two SSDs one with Win 7, the other with Win 10. I created the dual boot a long time ago from the Win 7 drive.

I'm worried wiping will negate my Win 10 lisence since it was an upgrade not the original OS. I have the original Win 7 serial, but I don't think that is relevent to the process any more.
At any rate, I'd like to give the machine to an elderly neighbor, so I need to wipe it and reinstall Win 10. I don't know where to begin. Anyone able to point me in the right direction, for a step by step?

:)

 

dual boot win 10

I had upgraded my old 32 bit win 10 to a 64 bit win 10 system and while I was transferring my files, I dual booted from the original 32 bit Win 10 system. Now that everything is running smoothly, I would like to remove the old 32 bit partition and included
the space in my new 64 bit system. However, when I go into the disk management, it is listing the old 32 bit system as 'system,active,primary' partition and is listing my new 64 bit system as (boot, pagefile, crash dump, primary partiton). I am afraid to make
this partition as active in case I lose all my files. Any suggestion of how to get rid of the 32 bit partition and make the 64 bit system bootable?

Thanks

Key Buster

 

Dual Booting with Windows 8.1


The procedure below will allow you to boot Windows separately or in dual boot configuration.
Here's what I recommend to do:

1. Disconnect the drive containing Windows 8.1
2. Install Windows 10 with one drive connected.
3. After step 2, reconnect the drive containing Windows 8.1
4. Boot up Windows 8.1. Open disk management and take a note of the drive letter of Windows 10 OS.
   NOTE: if you boot up Windows 10, then take a note of Windows 8.1 drive letter
5. Open Admin command prompt and type: bcdboot X:\windows where X: is the drive letter of Windows 10 (Windows 8.1 if you boot from Windows 10 in step 4)
6. Reboot the PC. You should have a dual boot screen.

NOTE: To break off the dual boot setting, Win+R->msconfig->boot and delete the none default entry on the list.

 

Upgrading on a dual boot machine

I have a dual boot machine with Windows 7 and 8.1. Both installions are entitled to receive the free upgrade. Is it possible to have a dual boot machine with two installations of windows 10?