|Hopefully that helps you, but the multiple connections to one router do my head in at our house. If a computer is turned on, both of the XBox's are disconnected from XBox Live. Again, although it might not be your problem, you figure although you have lots of connections, you're still dealing with only one router.|
Also, run Malware Bytes on your system and check for trojans. If you're using the system for gaming, a lot of people who have games which used various versions of SecuRom (I hate this program) as DRM found that the programs periodic connections to the internet somehow infected their PC's with trojan viruses. My daughter also had this problem. You can also run Kapersky (I think that's what it's called) to check. She had AVG 8.5 paid version yet trojans were still able to sneak under the radar and completely destroy her computers performance, especially the internet.