Hello all smarter people on tech:

Plugged into the wall now; given network key for roadrunner.

Sometimes consider trying harder to figure this out because money could be possibly saved.  I was given the key unasked for by a friend.

1. I pay Oceanic Time-Warner now Spectrum for internet service in Hawaii.  Could the key be used to entirely substitute for whatever I am paying for now (only internet - no tv, cable)?

2. Do I need a router to access wireless?

https://archive.codeplex.com/?p=virtualrouter
Here an article for the version of Windows on my computer about virtual routers.

3. Are there any disadvantages to wireless?  Main concerns - Would it not be as reliable as plug-in internet access?  Would it be powerful enough to run a forex trading platform which I am guessing is the equivalent of a gaming platform for video gamers?

https://www.labnol.org/software/wireless-network-without-router/11494/

It's all mystifying; plugging into the wall and paying Spectrum was automatic until I got the key.  

n