My MacbookPro has frozen up.  It is not responding.  restart.  Tle spinning wheel keeps turning.  What to do?

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Am not able to do anything: log off, shut down, bring up console window, etc.  Pressing power on/off button has no effect.  The spinning wheel keeps spinning. 
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Replay

Insert your OS installer disk. Then hold down the power button until it shuts off. Then press the power button and hold down the 'c' key so it boots to the installer disk. From the Utilities menu select Disk Utility. Then select your hard drive and then select Repair Disk.