1. Yes, it is a homenetwork that connects the computers.
2. My dad wont tell me where the manual is, he thinks that you are going to haxor me
3. The cable internet we have we are sharing it, as well as the printer.
4. No, i dont notice any other problems with other Network aspects.

Hope that will help, i will try to figure out more about the problem, as well as finding my router. Ill keep you informed. Thanks in Advance