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Please close thread.

Yeah, I checked already. I've tried all the suggestions and none have worked so far . BRB blowing my computer up.

Thank you. Didn't see that thread. From your understanding, do you have any idea why this might happen?

I have Mac OS X Lion Developer Preview 2 installed. When opening the App Store and attempting to Sign In through the Store menu, the system responds with the message "No GUID is available. Contact Support for assistance." in red font. Can anyone help me with this issue, please? I'll really appreciate it Screen shot enclosed.