The Puppy bootloader is a problem. You should have used frugal install and grub2, not grub4dos. GRML won't work corectly for you with grub4dos. We have no simple way of verifying that the LL ISO is correctly burned to a bootable USB, unless you have another machine to test it on. If the LL ISO will boot on the USB on another machine I would say that it's safe to delete Puppy. If you intend to keep Puppy I have to find the grub edit entries involving SELinux, or you could reinstall Puppy with frugal and grub2.
TC
TC
All opinions expressed and all advice given by Trinidad Cruz on this forum are his responsibility alone and do not necessarily reflect the views or methods of the developers of Linux Lite. He is a citizen of the United States where it is acceptable to occasionally be uninformed and inept as long as you pay your taxes.