Ubuntu Networking :: Can't Connect In Full Version But Can In Trial

I downloaded Ubuntu and was hella pumped to use it.. I downloaded it, burnt it at a 4x speed (slowest I can) I did a clean install and made it the only OS on my Hard Drive. After installing it said I didn't have connection. After a good 3-4 hours, I tried every option, I even got it to say I was connected but I still had no Internet connection. I put in my Windows 7 disc to go back to what I originally had. BUT I couldn't install it to a hard drive that wasnt formatted at NTFS, I guess Ubuntu changed my HDD. So, I put back in my Ubuntu disc and clicked 'Try Ubuntu'.. Found out that the TRIAL gives me Internet but the full version does not. I copied down the configuration that the Auto Eth connection had, and went back to the full version - I already had in the exact same configuration. So im here with a trial on my computer, can't download anything or install anything. I cant go back to Windows 7, and I need the disc in to use my computer.