My Norton Internet Security 2009 is experiencing real problems with configuring updates. At the moment it is booting, then showing me it is configuring updates Stage 3 of 3 at 0% complete. It shuts down every five minutes, reboots and shows the same information i.e. configuring updates Stage 3 of 3 at 0% complete. It sits on an Acer Aspire 5570 running Windows Vista Home Premium. Any clues