Bought this tv last year and very pleased with it. Recently purchased the PTA01 wifi adapter to expand the tv's usage a little and found that some functions didn't work, BBC iplayer for instance. Today I reconnected the wifi dongle and was asked if this was the first time I had connected it. I answered 'no' and the tv went to a screen which said 'software update found' so I accepted it and it appeared to download the update. The manual states that it will switch itself off and on whilst it updates and not to touch anything so I haven't. It went into standby mode about two hours ago and is still in this state. How long does an update usually take?