Help

I have read every forum here regarding my issue, which is internet connection issue. Although I am completely sure that anyone with even the most basic knowledge was able to understand. I on the other hand do not understand the difference between hardware and software or any other technical issue. I need help using the most basic of language.

Here is what I do know:
Windows 7 Professional
Model Lat 5530
Dell
Processor- Intel (R) Core (TM) i5-3210M CPU @2.50 GHz
Memory 4.00GB
System Type 64-bit Operating System

New modem from Brighhouse
New Router from Radio Shack - Belkin (but have used two others to ensure not the router)
22 Tech calls to Brighhouse
15 Visits by technicians
There is no wires from the modem or the router to any device, I had McAfee at one time but it is since expired (I think), This computer at one time was "Networked" with my job but is no longer

Note 3 Phone is using data, not wifi
Computer is never online. -There was a forum where you walked a girl through all the steps, first step being to do the McAfee Removal tool. I could not get past there. But her description of events was almost exactly my issues.

Please help- Divorce is looming over fights regarding internet!