...as I've verified other conditions and solutions pertaining to them and none work.

I tried making my Windows Font folder non-read-only, but GOG still wouldn't install unless I skipped this error.
[and I won't push it with some permissions on some system directories/files, as modern Win' seems to intentionally break when one attempts of overthrow its increasing "Authoritah!"]

I think this is why every update to GOG still retains this error, even after a deep uninstall and re-attempt at reinstall.

Assuming that you're writing about Galaxy, it would probably be better to go to http://mantis.gog.com and report your problem there.

Thanks.
Done.
Edit: Ticket 0004015

I'm going to have to hold on to the "Essential Components Missing" error for now, else I cannot install GOG unless I skip the "AddFontResource failed" error which throws up choices of...

Either:-

Broken "Essential Components Missing"/massively delayed start-up Galaxy - after ignoring install errors.

or...

No Galaxy, due to cancellation and roll-back after Windows' Fonts folder install failure.

I want Galaxy installed, so I have no choice but a broken install until this is addressed.
[no action regarding my Mantis ticket as of yet]

The italics needs the [ bracket moved to the end [/i]

also mantis is fantastic ive gotten confirmation or information out on many bugs for them

Thanks.
As I usually type the formatting first, I must have dropped the cursor back in the wrong slot to add content.