It sounds like you've installed these two in backwards order. That is you should install Windows 7 first, THEN install Windows 8. It also sounds like for Windows 7 you need a driver for your NIC. Click Start and right-click Computer, click Properties, then Device Manager. Click the arrow to the left of Network Adapters and see if any of the entries there have either ! or ? there. If so, you've found your problem. Download the proper driver and install it, and that should allow you to get on the 'net.
Alright, so I do have windows 8 installed on my main partition. I have created a second partition with he right settings and volume and size. I have installed a versoin of windows 7 (Not actually purchased) and have used something called the DAZ loader to activate windows 7. When I restart my computer and I select windows 7 everything works properly except for one thing. I have no internet connection. I have a ethernet cable plugged from my router to my computer. Now I can't find an internet connection because it says I have no adapters? I cannon run windows update because I have no internet? It makes no sense. I can basically do nothing for my internet and I need a fix. Would someone please help me?