Since changing from BTOpenworld to BTYahoo I have been unable to download particularly from MS windows update and some websites are unobtainable. Trying to get MS WU sometimes gives screen saying I am unauthorized. I operate Windows ME and have Zone Alarm Pro firewall and Norton Antivirus installed. When I try to get latest update from Zone Alarm I get Cannot find server screen. BTYahoo say they cannot help and Zone Alarm have advised on all avenues they can think of without success. I have tried turning off Norton before accessing the web but this has had no effect. Similiarly with Zone Alarm. Not being an expert I am mystified and would welcome suggestions.