Imac 21.5 mid 2010 freezes is very slow enable to select anything.

Hi,
Could anyone help with a problem I think I've overloaded my memory on my mac because ever since I transferred my iPhoto library to desktop it copied 18000 photos disk utility says I have 150gb of 1tb free, would like a method so I don't have to lose all files.
Thank
Rich

Hi!
First of all, thanks for the compliment.
I totally forgot about the RAM upgrade...
It was done half a year (a bit more) after I bought the iMac. I think I can safely say that the freezes began four or five months after the upgrade.
I see discrepances between the required specs and my RAM specs that I didn't see years ago...
My RAM specs:
204-Pin DDR3
1333Mhz
PC3-10664
Unbuffered
Non-ECC
1.5V
4GB Module
Could this be causing the freezes? I can just pull out the RAM module and see if it no longer freezes, but like I said, It happens very randomly, and not a lot of times. Unfortunately, I need that 4GB module, but if you think that it could be the problem, I can easily buy another one (this time with the right specs), luckily they are not very expensive.
I'll be waiting your feedback. Thanks!

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    Time Machine:
              Skip System Files: NO
              Auto backup: YES
              Volumes being backed up:
                        Macintosh HD: Disk size: 464.96 GB Disk used: 303.96 GB
              Destinations:
                        Iomega HDD [Local] (Last used)
                        Total size: 931.39 GB
                        Total number of backups: 147
                        Oldest backup: 2011-10-26 11:07:35 +0000
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                                  Backup size 931.39 GB > (Disk used 303.96 GB X 3)
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              All volumes being backed up may not be listed.
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                   9%          Google Chrome
                   6%          WindowServer
                   3%          mdworker32
                   2%          EtreCheck
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              135 MB          com.apple.IconServicesAgent
              123 MB          PluginProcess
              123 MB          Safari
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    Virtual Memory Information:
              9.28 GB          Free RAM
              1.66 GB          Active RAM
              303 MB          Inactive RAM
              783 MB          Wired RAM
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    Y tried to reinstall system,same problems...
    I think is a hardware in 13 ,15 and 17 macbook pro 2010.
    I will not accept a hard drive repair,i will request a new unit.
    It only has 2 months......And as my job depends of a laptop, i need a new one.
    Now im again working with my old Powerbook G4 (2002) and still goes perfect !!!!
    BTW: check this link,apple is returning new unots tosome users with same problems
    http://appletoolbox.com/2010/05/continued-macbook-pro-mid-2010-beach-ballsfreeze s-apple-replacing-testing-units/
    By the way
    It happens with 10.6.3 and 10 6.4
    Hardware test OK!!
    And just system installed with no aplications...
    I only use Traktor NAtive instrumentes for my performances....all original software.
    Freezes were with traktor and without it on system....
    External hard druve boot tested and also freezes.
    Repair permissions and the same problem.....
    APPLE,PLEASE, YOU CAN DISCOUNT TO ME A MONTH OF USE ,BUT I DONT WANT THIS UNIT FOR SURE.

    Hi,
    I've been having the same problem. I'm a Dj, like a lot of people I use Traktor Scratch Pro. I've been using a mac for mixing for around, 2 years now, never had a problem. Since I updated to leopard snow, I've been experiencing the exact same problems described in this post,the screen freezes, sudden dropouts, when using Traktor software exact same thing, audio dropouts, screen freezes when loading track, or searching library.
    I've been doing a LOT of researching, and I'm almost sure the problem is Leopard Snow, I don't know why but I'm almost certain. I erased mi HD, thinking this would solve the problem, loaded snow leopard again... EXACT same problem occured.
    I tried all the suggestions in this link, none of them worked for me... http://appletoolbox.com/2010/07/mac-os-x-10-6-4-troubleshooting-guide/
    So, right now I'm downloading an older version of MAC OS 10.5.5, I will format (again) my HD and install this older version.
    I will post again if this solved the issue, hope this helps.
    Apple URGENTLY needs a new update (10.6.5) there are a lot of other people like us, that are depending in a lap top (mac) to perform to a lot of people, you can check the forums in www.native-instruments.com, and see this issue is hapening to many of us.

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