Internet problem in window and fedora installed system

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http://forums.fedoraforum.org – I have installed first window 7 professional in my pc. Internet was working on window 7. Then, i have installed fedora 18. After installing fedora 18 on my pc that time internet was worked on fedora. But when i boot fedora after first time boot window. Then, internet don't work in fedora 18. It shows cable unplugged. But if i boot window then in window it works on same setting. (HowTos)