nothing working since Internet was cut off

Got forza 5 on disc and am having to install it everytime I put the disc in, trying to go on my digital download of fifa and saying it took too long to start as is network settings. Getting pretty annoyed at the minute. Can anyone help as I was informed
we would not need Internet connection to play hard copy games

:)

 

wont connect to internet

Im playing COD and all of a sudden my xbox cuts me off internet and wont connect again either wirelessly or hardline.. all my other devices in my home are working off the same router and are working just fine.. even my router says its connected in port 2
for my xbox.. running a diagnostics test also on the xbox says it cant find the internet after its been working off of it for the past 2 years.. what is the problem with my xbox??

 

I can't connect to Xbox Live.

Yes. That doesn't work. It cuts off my internet completely.