Colin <div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Have you checked with your router switched off, in case it is hiding another network on the same channel? Also there are other devises that can use the same frequencies but do not show up (wireless CCTV cameras for example) so it would not do any harm to shift to another frequency as far away as possible from the current one just in case this is the issue. </blockquote> </div>Wouldn't this also affect my MacBook ? But having said that, I think your other post may well be correct, as I am still connected. This is the first evening in weeks, that I have stayed connected all evening. For now, I think I will leave it alone, but I will have a look at changing frequency, assuming the problem returns. Thanks, Graham