Why would my home computer be having internet connection problems?

Something happened a few weeks ago where the wires to my computer got disconnected. In trying to connect things correctly, Belkin (router manufacturer) told me I should buy a new router. Got the new router, still had connection problems. Had the cable/internet provider send a refresher signal, STILL had problems, even though the icon for network connection said “connected” and “signal strength: Excellent.” Called the cable provider and asked them to send another signal, and she did, and she told me to disconnect everything and connect it again, which would reset the signals (or something like that). She told me “I’m looking at your levels and everything looks good.”

I did that (disconnected everything and hooked it back up) and I am still having connection problems. I would say about 50% of the time, it either times out or it can’t connect to the server. Often, the remedy is to shut the computer off completely, turn it on again, and it usually works ok (not all the time, but often).

This has been going on for the last two weeks and it’s very annoying and time consuming. I don’t send emails and respond to Fluther as often (I’m at work now) because it’s annoying to type something out and have to lose it or discard it.

Help!