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Ethernet not working bc os doesn't belong to computer?

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This computer's hardrive got friend. Lost my os, I bought a new computer copied windows onto a USB and booted this computer up with it. Now I cannot get ethernet to work. Any ideas? Do I need to get a recovery disk for my original windows or can I do that online somehow to get the OS that actually belongs to the computer?

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Hi:

 

What is the full model number or product number of the PC with the ethernet issue?

 

Use this guide to find that information...please do not post the serial number...

 

https://support.hp.com/us-en/document/bph07555

 

 

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23-n010 - model

F3f00aa#aba - product

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Thanks.

 

What operating system are you running on it?

 

The specs state it came with W8.1 64 bit.

 

https://support.hp.com/us-en/document/c04328204

 

If you are not running W8.1 on it, the ethernet adapter probably needs the driver installed for it.

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I have windows 10 installed on it bc I copied it from my current computer. 

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Go to the device manager and click to expand the Network adapters device manager category.

 

You should be seeing a Realtek ethernet adapter listed there.

 

If you don't, then the onboard ethernet adapter is no good.

 

You can buy a USB to RJ-45 gigabit ethernet adapter as a workaround, rather than replacing the motherboard.

 

https://www.amazon.com/Network-Adapter-CableCreation-Ethernet-Supporting/dp/B013G4C8RE/ref=sr_1_1?dc...

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I used the ethernet after the windows 10 share at my house and it worked. However after I give it to him now it dont 

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As I wrote earlier...if you don't see a Realtek ethernet adapter showing up under the Network Adapters device manager category, then the adapter has died on you.

 

Windows 10 would have automatically installed a driver for the Realtek ethernet adapter and it should have been working.

 

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Yes the realtek family controller is there. 

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