I have an HP Pavilion laptop with Windows 8.1. It has an internal Realtek 802.11 bgn wifi adapter. I use Optimum/Cablevision as my ISP. I often travel to a town where all kinds of reception are poor; I can't even get a clear radio signal to listen to local radio stations on a standard old-fashioned clock radio! There are lots of Optimum hotspots in the town, but they all only seem to work outdoors, albeit poorly outdoors, too.
Is there any kind of extender or adapter I can buy to extend my wireless signal so I can use my laptop indoors? As I visit multiple homes and businesses there, and don't want to plug into each of their routers if I can help it, anything requiring Ethernet cables is not an option. I'm a bit of a hardware luddite, so I can't try to build my own cantenna (and don't know whether that would work anyways.)
I tried calling Optimum for help, and although their customer support usually is great, they couldn't help me with this one.