"iso" new entry portable/external media grayed

I take it that you are using a UEFI W10 PC ?
In which case you should have seen
efi.JPG
when EasyBCD started.
Clicking on help would send you to

EasyBCD and UEFI

With the release of Windows 8 and Windows 10, many new computers are shipping with something known as the UEFI firmware and boot manager in place of the traditional BIOS and MBR approach to startin…
neosmart.net
All "greyed" features are because MS doesn't allow such actions under the efi version of bootmgr.
Nothing EasyBCD can do to circumvent the prohibition.
Sorry.
 
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