Do I need to tidy up networks

Please bear with me as I am very new (to networking) and very old (in years) If 81 is considered old these days.
I have suffered a lot over time from Virgin's Superhub, loosing signal, self resetting and more. however that is no longer a problem. They gave me a new Superhub that that appears to work well. my problem if it is one that A) I seem to have setup Network 5 and have no idea what happened to 1, 2, 3 and 4! Are they working away somewhere in the background or dead or what? B) Are some of them public networks?
I may not have a problem at all, just a lack of understanding!

Don't worry about the number, 5. It is of no worry. It's a Windows think. No you don't have 4 other networks running.