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#11
Do you mean that you have got the 32-bit install media, or that you have now upgraded to 32-bit Windows 10?
To make the 64-bit media on a bootable USB (you'll need to boot from it to do a clean install) run the Media Creation Tool and follow Option One in this tutorial...
Create Bootable USB Flash Drive to Install Windows 10
at step 4 select 'Create installation media (USB flash drive, DVD, or ISO file) for another PC'
at step 5 untick 'Use the recommended options for this PC'
at step 6 choose 'Architecture: 64-bit (x64)'
(don't change the language or edition, those are already correct for this PC)
then follow the rest of the instructions until you have made the USB.