[ubuntu] 12.04 keeps nagging me to upgrade

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http://ubuntuforums.org – 12.04 64-bit on my laptop, keeps telling me to upgrade, telling me to close my apps and press OK to upgrade. But I don't want to upgrade. How do I get it to stop? When I run Update Manager I keep getting this message. In Settings, I've got Update Manager to tell me about new LTS releases, and I certainly haven't asked to upgrade... Attached Images Screenshot.jpg (74.0 KB) (Hardware)