Hi i have a Dell. Hi i have a Dell Dimension E521 desktop and connect to the internet through an

Question

Hi i have a Dell Dimension E521 desktop and connect to the internet through an ethernet cable to a BT Hub.This has work up to yesterday when we could not connect.The pc advises it cannot find a network. My laptop can still pickup the hub through wireless.unfortuately i do not have wireless on my PC. I have been on the phone to BT and they state that it seems the PC is not picking up the Internet ip address which i beleive should be 192 or 172. when i do ipconfig it is picking up a ip address of 269..they advised that i should contact dell and find out how to delete and then reinstall my network adapter.Dell want 39 quid to answer any of my questions. Could you talk me through what i need to dothanks