1. I could not find any information on the make and model of the modem other than it's Spectrum / Charter produced equipment. I took a picture of the back of the device and it has the model number on it. I edited the serial numbers and IP / MAC addresses accordingly:
2. I do have a range extender and that is about it. I do have the make / model of that - it's a Netgear EX6200 and I need that to extend the range of my network into parts of the house where it cannot reach.
3. That's what I am thinking. I am planning on calling Spectrum sometime today.
4. Yeah that's one thing I think could be a problem is that the cabinet where my wifi adapter sits now is home to a rat's nest of cables and my attempts to sort things out have only made it worse. My router right now is a TP Link Archer 2600 and it has relatively basic connectivity with only 3 wires (input to router, input to modem, A/C adapter) so I can't imagine that would be it, though I could certainly give that a shot.
5. There are no wired adapters on this network, it's almost entirely wireless.
6. There are 3 desktop PCs, 4 laptops, 2 tablets, and a few smart devices like Chromecasts, a Ring Bell, and things of that nature.
7. I did that.
8. I attempted to hard wire my laptop to my modem directly but my laptop didn't like the connection. Is there something that I am doing wrong there?
9. Spectrum says that I should be able to, and they did the last time I called them, which is why I got the modem in the first place.
The other thing I could think could be a problem too is that the cable connection in my house hasn't been updated in like 20 years. And it was from the days when we had a monopoly on who our cable provider was (it was a small mom and pop operation that got swallowed by Adelphia, which got swallowed by Time Warner / Spectrum), and they required an A/B switch in order to operate the cable TV. Is it possible that could be the culprit?