I've been using my notebook at work exclusively for the past 4 months and now want to use it at home too. I used to use it at home aswell as office about 6 months ago without any probs, however I now can't gain access to my home wireless router and although my notebook recognises that the router is there and the signal is excellent it pos up with the following message: ''The wireless adaptor failed to get a valid IP address. This can be due to an authentication failure with the network, incorrect wireless security passwords (encryption keys) or because of a DHCP server malfunction.''

Please can somebody help...my user name 'luddite' is so called for a reason!!

Thanks

does your router have any other security features enabled?

MAC address filtering is one possibility that springs to mind which would explain why your laptop cannot connect