Why is my computer using two networks now?

[robles56]

Only today, my internet connection started to fail for no reason. My normal 18 mb download speed has gone down to 1 mb (this has happened already before, I downloaded a 4 gb game on my friend's laptop using my internet, then recently, a week ago, i re-downloaded the game on my computer. But also, when i check the internet icon (Windows Vista), it says Currently Connected to Network 3 Access: Local and Internet, Network 2 Access: Local and Internet.

I checked both networks and they seem to say the same thing, about my ISP, Roadrunner.

Why are there 2 networks?

OS: Windows Vista 32 bit Home Premium, SP 2 (?)
Make: Vostro 200
Ram: 3 GB
HDD: 74.4 GB
Scanners: Nod 32 2.7, MBAM (free)

[Citizen Swooboo]

I have had this happen on a wireless network.  A neighbor got internet, and his signal was strong enough that my computer picked it up over my own network.  I had to go into my network settings and disable the rogue network and make sure mine was set as the preferred.