I have had this issue for a while now and i have attempted many things even restoring Windows back to factory settings.
My HP Windows laptop connects fine to my BT home hub 3 via wireless with no issues but the ethernet connection just recognises a local network and has no internet connectivity.
my ethernet connection just never gets an IP address and always assigns itself a 169.x.x.x address.
Originaly thinking it may be a hardware issue i booted into a Linux live cd to double check and the ethernet connection worked with no issues at all.
I have tried numeorus things to try and resolve it-
updated drivers / alternative drivers
reset TCP/IP
restored windows back to factory installation
assiginged static IP address
removed anti virus / firewall software
different router
please does anyone have any ideas of a possible solution?
Have you tried a different ethernet cable?
Disabled/turned off the wireless on the computer.
Connected the ethernet before turning on the computer.
Usually the system will default to an ethernet connection, but with a working wireless connection, the system may not even try to establish a wired connection.
Since the ethernet works with the Linux Live CD I suspect the Windows driver or a non-Windows firewall or security suite.
Make sure you have the latest driver from the PC (or motherboard) manufacturer's site.
A few firewalls (I think at least one Norton product for example) have different settings for wired and wireless, so it is possible to succeed with one but not the other. What firewall(s) do, or did, you have on the machine?
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