John arrived on time. He listened carefully to the problem Id had and followed a logical sequence to discover the likely problem [the wifi drivers had not been automatically updated on my 3 year old laptop] He proceeded to check other possible contributing factors and gave advice on improving my wifi network. He was very timely and the work was completed in just over an hour. He appears to have succeeded [it is early days!!!] where experts in town had failed . I am very impressed and most grateful. I had wasted hours (including buying a new router) trying to fix this problem. Many thanks!!!