[General Maximus]

Ignore what I just said, I got my threads mixed up. The only way you'll know for sure is if you trying using another router/wireless access point (first point of troubleshooting) and it is a good place to start because going by what you have said it is the only thing to have changed and just reinforces my view that everyone should have their own proper router. By using cheapo isp supplied cpe you leave yourself at the mercy of a company who doesn't care about customer service, quality, performance or testing and only cares about cost.