What's with the my mac going black after sitting for awhile?  This tarted happening after I downloaded Lion.  Other stuff too, like all these pages pop up, like my calendar and such.

What's with my screen going black and I can't escape or do anthing except push the power button off and turn it on again?  This all started after I downloaded Lion.  Other pages pop up when I turn it on too, like my calendar and apps and such.  I have to click off all these every time I turn my computer on.  Thanks for any info.

You're in the wrong forum. Post here.
https://discussions.apple.com/community/mac_os/mac_os_x_v10.7_lion?view=discussi ons
or here
https://discussions.apple.com/community/desktop_computers/imac_intel?view=discus sions#/?per_page=50

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