My 27" 2010 iMac  has recently began freezing and movement on the display is molasses slow. We have 500 gigabytes available and no applications running and the problems still persist. Any advice?

My 27" 2010 iMac  has recently began freezing and movement on the display is molasses slow. We have 500 gigabytes available and no applications running and the problems still persist. Any advice?

IF your system is running extremely slow with no applications running other than Finder then I'd suspect a failing HD or you have a runaway process somewhere. Open Activity Monitor (Applications - Utilities - Activity Monitor) and look to see if you have any applications taking a large %CPU, if you do that is your problem. To test the HD run Apple Hardware Test, please read:
http://support.apple.com/kb/HT1509
to learn how to run AHT on your machine, also run it in EXTENDED MODE so it does the most complete test. If no errors are found after the first pass run it another 2-3 times to be thorough.

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        4 GB RAM Upgradeable
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            Apple Inc. Bluetooth USB Host Controller
        Apple Computer, Inc. IR Receiver
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