Sorry but there seems to be a misunderstanding:
KM-Goanna IS and has always been a unique name for roytam1 forks of K-Meleon with Goanna engine!
Introduced since about 2 years. And I most definitely did not mean "RT-K-Meleon" as a name suggestion, was only meant as reference.
Perhaps this topic should rather be deleted?
try installing a different HDD or SSD
if that does not help, then I hate to say it, but the motherboard for the Inspiron 7720 needs to be replaced as it seems it now has a screwed up UEFI chip