Can't open mission control after installing mountain lion

Mountain Lion is working smoothly for me except that I can't open mission control. I became aware of this because the "hot corners", which I use frequently stopped working for me. Maybe there's a preference file somewhere I can trash? I can't seem to find anything in the library.

I'm having the same issue.  Not only the hot corners not work for mission contral, but neither do the keyboard shortcuts.  A restart fixes the problem for me, until my iMac (2011) goes to sleep and is woken up again.  After that, the mission contral functionality no longer works, and neither does the "show desktop" hot corner functionality. 

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    Thanks.
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    http://funbird.co.uk/tech-articals/google-chrome-freezing-and-hanging-problems/
    Hope this works!

  • Can't access my gmail after installing mountain lion

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  • Can't activate FaceTime after installing Mountain Lion

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  • After installing mountain lion i lost my pictures in iPhoto, lost my music in iTunes, internet became very slow. What can I do to fix this issues

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  • Can No Longer Get Camera Photos After Installing Mountain Lion

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  • HT1338 After install mountain lion my superdrive do not work

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  • Microsoft Word Intermittently Crashing After Installing Mountain Lion

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    Hi there,
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  • Ive just upgraded my late 2009 macbook, and things are not working properly. First of all, when I started the computer first time after installing Mountain Lion, some message advised me that some files were impossible to install.

    Ive just upgraded my late 2009 macbook, and things are not working properly. First of all, when I started the computer first time after installing Mountain Lion, some message advised me that some files were impossible to install. Once I wrote my password, and for now on, everytime I start the session, another window advise me that "Java SE 6" is missing, due that, the computer can't run some "CS5Service Manager". If I try to install it, the download ends with an error. If finally, you skip the istallation, you arrive to the dock, but the menu bar at the top of the screen doesn't show up.
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