I get random freezes and have to force shut down

My iMac woked fine before OS X Lion, But now it randomly freezes up and I have to hold down the power button.  I have tried just letting the Mac stay freezed, but I still have to force shut down.  Please help he resove my problem.

Try some of the fixes in Understanding upgrade nightmares*.  I'd be particularly inclined to blame third-party software, but obviously can't be sure that's the correct diagnosis so quickly!
* Disclaimer: links to my pages may give me compensation, and should not be taken as endorsement of my services by Apple.

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    Try some of the fixes in Understanding upgrade nightmares*.  I'd be particularly inclined to blame third-party software, but obviously can't be sure that's the correct diagnosis so quickly!
    * Disclaimer: links to my pages may give me compensation, and should not be taken as endorsement of my services by Apple.

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    Close all apps in Multi-Task Window.
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    Hi, jeantwin.
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    iOS: Changing the signed-in iTunes Store Apple ID account
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    I have recently started using firefox. Everytime i shut down the pc it will not shut down automaticlly...It says firefox is waiting for a programe to close and for windows live messanger to close..I wait and nothing Happens so in the end everytime i have to force shut down my pressing force shut down button. This also happens on logging off to switch to a diffrent user. This happens everytime i close down.

    The following may not completely eliminate having to terminate Firefox through the Windows Control Panel but it will come very close.
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    Firefox 5.0 now available in my area anyway "Ctrl+H" (Help) > About Firefox

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    Please read this whole message before doing anything.
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    Hello omni:
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    Hi all,
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    Press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly to restart.
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    Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
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  • Applications freezing and Macbook won't shut down

    I have a 15" MBP, i7 2.66 GHz, 8 GB RAM, and a 500 GB SSD. It has been an awesome machine until about a month ago. It started randomly freezing with different applications running. I would have to force quit the app, then when I tried to shut down or reboot, it would freeze at the gray screen with the spiinning circle. I did some research and thought it might be the SSD, which was somewhat new when this started happening, so I sent it back and got a new one. I did a fresh install of Lion and all my apps and got the same results.
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    Hello omni:
    You might try running repair disk from your software install DVD.
    Barry

  • HT201263 iPad 3: it just shows apple logo and even with force shut down it comes up to same.. Last time it went in recovery mode and itune couldnt resotre.... real s````t product... not happy.

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    Try:
    - iOS: Not responding or does not turn on
    - Also try DFU mode after try recovery mode
    How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
    - If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
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    Apple Retail Store - Genius Bar       

  • HT5622 I forgot my ID and password and asked and received new ones. Now my applepro is not willing to shut down for a restart as it does not want me to loose data because of unsaved changes. I cannot use my new ID and password to force shut down. How to p

    My question is about starting again of the Macbook Pro.

    You need to use the Apple ID originally used to setup your Mac.
    Apple ID: How to find your Apple ID
    If that doesn't help, contact Apple > Contacting Apple for support and service

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