I really should be able to sort this, but my brain hurts! Re-installed XP on a new HDD. As often happens, there is no LAN driver. Went to the Acer website on another PC and downloaded the XP version of the driver. Unzipped it. All I see in the folder are Rtlnic and Rtlnicxp - both have the 'windows doesn't know what this file is' symbol.