First I'm most sorry to hear about this and second is it possible to test this on another card brand or a different computer? Does your daughter's computer contain the exact same hardware and software as your device or different?

I mean the only thing I can think of at this point is that the game is using a process the current hardware or software simply cannot initiate no matter which update version is installed.

I'm using the same OS and i7 6700 and have an Nvidia gtx960m running on a MSI brand device.

I do wish we had the devs still, who would ordinarily have worked with you to fix this.

You mentioned reinstalling DX9. And you're likely on the right track, but the rest may be experimentation to see if it can be resolved.

First up, I'd see if you installed the following:
DirectX End-User Runtimes (June 2010)
https://www.microsoft.com/en-us/download/details.aspx?id=8109

That's a full installer (so everything gets rewritten), not a web-based (which will only reinstall missing components).

I don't like uninstalling Windows updates (though I had to do it on one of my servers last week, coincidentally enough) however there was mention in another thread elsewhere that an update (KB3091424) from MS might have replaced one of the DX9 DLL's in the Windows folder. I'd start with a full install of the DX package I linked to before moving to uninstall a Windows update, then maybe if you can the ogre.log from the documents\my games\runic games\torchlight 2\ folder and (if you're up for it) the nfo from msinfo32.exe to get a better overview of the whole system.

Otherwise... we could tinker with the local_settings.txt file (also in documents\my games\runic games\torchlight 2), as that's where the game graphics settings are stored.
Could either delete the file entirely (so it would create a default copy on [attempted] launch), or play with for example switching it from fullscreen to windowed - I can't test (and wouldn't rule out, if it applies) but could it be an ultra-wide monitor resolution causing it, or something else related to sync with the monitor for instance?

Setting lines to the following in local_settings.txt would force it to windowed with a small res, just as a test to see if it would launch for instance.
WINDOWED_FULLSCREEN :0
FULLSCREEN :0
WINDOW_WIDTH : 800
WINDOW_HEIGHT :600

So I can see this is old regardless i found a fix, i own the game on steam and if you notice if you open the mod launcher it'll say on the bottom right that steam_api isn't running which i believe to be the problem my fix was to find a dare i say it "cracked" steam api off the Internet along with a codex.ini and placed those in the folder and it started right up if you want i can post these somewhere.

Steam sometimes got you broken launcher file with .exe extension. Just download from torrent torchlight 2 and replace in your steam folder. By example steam/steamapps/common/torchlight II/torchlight2.exe

Hi, I found a solution to this problem, when installing the game from the steam you need to change the path from disk D to disk C, and the game will start (I started

Whenever the game refuses to load, the first thing to try is to delete the game's local_settings.txt file. It doesn't hurt anything, and the game will just make a new one when you start to play. If you had made any changes to the options in the game you may have to reset them. Otherwise your good. The local_settings file gets corrupted easily, so this is always the first thing to try.

Just restarting steam helped me.