Help plz! eternet adapter problem

Ethernet was working a few days ago then i switched to Comcast xfinity. than i noticed on my internet stopped working i had Ubuntu so i though it was it so i installed Windows 7 ultimate but there's the same problem. it says cannot install drivers. no Intel(r) Adapters are present in this computer.... what does it mean and how do i fix it. also on the computer im using on the Ethernet place the cord for this computer is green and blinking but for the one im having trouble is orange and not blinking and i have switched to 3 other cables and different spots but same problem.. help plz!

When you switched to Xfinity, you needed to have someone set up Internet access for you When they were Comcast, they needed to record the Mac address of the adapter device that you would use to connect to them. They denied this (of course), but I was able to verify it by switching PCs and confirming that with the second PC, there was no access. You will encounter the same problems regardless of what OS you use -- as it is on THEIR end, not yours.