Client isnt Auto Updating

When i open the pbe, ever since the beginning of this cycle, the popup warning me that there is an update comes up. Once i click the 'Restart Now' button, it just leaves the pbe client open, sitting at the login screen. I've already performed a Full Repair on the client, which brought it up to date. In the days since, it still hasnt been updating like it should. Any ideas on how to fix this? Is this a bug?
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