hi again, go to this site and download the driver however you will need your product code like the machine number and download network drivers
http://welcome.hp.com/country/uk/en/support.html
also you can try this site and try downloading the drivers one by one. download it then extract it and install then reboot pc. keep trying this for all of them and one should work when you install it and it doesn't work uninstall it afterwards.
http://support.thetechguys.com/layout.aspx?ID={8c4fa308-5ded-4f52-8fc1-b4263e3a51b5}&CatID={a56b65b3-138d-4151-a192-e4985a9b9180}
this happened to me once and i would like to ask does your laptop pick up the wifi signal and connect to the internet.
this is what you need to do disconnect the wire from the router and look at the router from every angle bottom top right ect and look for a button normall yellow if you find it, you will need to use a something sharp and keep it pressed for one minute. this will reset all the setting and you ethernet will work again. and you will need to configure it again. i persume bad setting dchp somethign like that.
also you can try contacting sky or you router company. i hope this works for you.