extending existing wireless connection.

I have ADSL2+Router(Huawe Echolife HG521) working with a MacBook, (wirelessly) and a PC Ethernet connected. Both computers work fine.

I have built a new computer with Gigabyte GA-z77-D3H MoBo (running W7 Home Premium), MoBo claims " On Board Lan Controller, which is by default:Enabled. What does that mean?
It has an Ethernet port as well.I assumed it will work if I connected it to the router via Ethernet. No it does not.

How do I get this computer to work with my existing set-up wirelessly?
Do I add something to it or it should work as it is?
Be very grateful for help and advice.

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Clarification Request
I read you built the machine.

But no word about installing an operating system and drivers.

Tell more.

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Thank you

I know You are a source of great inspiration. Thank you for being there.
As soon as I read your response I knew , I had overlooked something.

I had ,before writing my request for help, loaded the W7 Home Premium, and had loaded all the stuff off the disc provided with the MoBo.
It offered a choice of loading all drivers or one by one. I had selected to load all. Obviously something had gone wrong.I could not get on the internet.
I went back to it after your message and did the same again, and I am using this new computer. Thank you.
Well in line with the British tradition of understatement Grin ,I am delighted.

Thank you and your colleagues who have over the years helped me . Now I have a PC just right for my liking.

I shall have a few problems along the line but you lot give me great confidence and "do it" spirit.

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It's nice to read when you fix it.

I like when I read folk dove in and tried again. In parting I'm getting a lot of noise from the field about "stuff like that". Or more specifically the newer owners are wondering why in the world Microsoft left bugs and more for them to deal with.

Example? Read some of those Microsoft and other company help articles and you find them telling us to delete some files or worse changing a registry entry.

It's been decades and just like the owners of Model T Fords may have put up with manually retarding the spark and priming the carbs, today's owners are not happy with the old ways.

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