Early 3-22-16 Follow-up:
KB3104002 has been completely installed, the full version IE9 64 has been restored, & the Windows Update portion of Disk Cleanup is available again which it wasn't before, an issue I'd neglected to mention.
However, there is no trace of KB3124275, even with an offer to be installed via WSUS check (a good or bad thing?), my Events Viewer, another previous issue I forgot to mention, still has a snap-in error, though it can now reveal partial results; and the Secpol settings still cannot be recognized by the machine to be applied, which I should note. are only created local/non-domain with the adm templates.
Besides doing Disk Cleanup & creating a restore point after cleaning up all except the last one, I haven't tried to do anything else, & am on standby for further instructions. But thank you MUCH for what you've done so far, which would have otherwise had to be remedied by another repair-install, putting me right back to where I was before the Langa Non-destructive upgrade I did, which is clearly not 100% non-destructive, as Langa claims.
-DKW3