What Country/State/Province do you live in? England, United Kingdom.
Modem brand & model number: VMDG480?
Router brand & model number: NetGear, VMDG480?
Network Connection Type: Wireless/Wired - Wireless for xbox, and wired for my PC
If Wireless, what type of encryption are you using? uh?
Things you have tried: I've moved my xbox away from my router, and then I moved my router towards my xbox
Is UPnP Enabled? Yes/no/Unknown - Unknown
Is NAT Type Open? Yes
Any Error Codes you encounter: Nope.
What type of internet do you have? Cable/DSL/T1/3G? Cable, I believe.
Who is your ISP(Internet Service Provider)? Virgin Media
When you run "Test Xbox LIVE connection" what is the exact message shown on screen? Says they're all connected, but whenever I join a game of Modern Warfare 2. I always disconnect, or I lag extremely bad.. This never happened like 2 weeks ago, it just started happening.