New
#31
Well, I'm out of ideas. At this point I'd opt for a reinstall. (Or restoring from a backup image ... but it doesn't sound like that's an option because if you had a backup image, you'd have chosen that route much earlier in this thread.)
Even if you were to get it booting again, I'd always have my doubts whether it was truly working properly. A lot of those repair attempts should have worked--indeed, the procedures you highlighted in your first post should normally have worked--so unless you can identify a reason why the repair attempts are failing you'll never be able to say with confidence whether some virus or a botched update messed up something you can't see.
That's the best reason for making backup images: instead of spending days wrestling with a malfunctioning system, you restore from a recent backup image and you're back up and running within an hour.
Your next best option is to factory restore, re-update Windows, reinstall your personal programs, and restore your data from your backups. Then install something like Macrium Reflect or similar, and start a regular regimen of periodically making fresh backup images. If you do that, you'll never have to suffer through a factory restore again.