I had a similar problem with a reliability update KB2454826 today. According to the update history that cannot be installed during the restart and then I get a fatal system error and have to go through the process of restoration before it can get to connect again. I'm done trying several times because I did not know at first that the updates are causing me problems and dropped to KB2454826. I've been running Windows 7 on a Vaio S laptop for several months and has not had a problem like this before this update.
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