That sounds familiar! Although not the update I mentioned there was clearly something not right with this month's offerings. Thanks chaps, all seems well now. Can Microsoft remove an item from the updates list once it's been accessed on a specific computer then? It will be interesting to see if my duplicate update disappears sometime soon. Presumably the list is checked after every startup.
Dell Studio1558 with Win7 Home Premium
HP Pavilion netbook Win8 6GB RAM
IE11 and Live Mail
BT Infinity via HH3
(Virgin 100Mbs as backup)