My iMac freezes up intermittly

Just got a replacement hard drive and now it is freezing intermitenly.  Any ideas?

Sounds like a heat issue, have you blown the dust out lately?
Is this a G5 iMac? Not sure how many sensors it has, but...
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
If you have any temps in the 70°C/160°F range, that's likely it.

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        Feb 13, 2015, 09:09:26 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Premiere Pro CS6_2015-02-13-090926_[redacted].crash
    Console log:
    15/02/15 20:36:03,558 syncdefaultsd[2719]: AOSKit ERROR: XPC CLIENT: Connection [0x7f9c61456170] event handler received event with type: [XPC_TYPE_ERROR].  Description: [Connection interrupted]
    15/02/15 20:36:27,164 xpcproxy[2916]: assertion failed: 13F34: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
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    15/02/15 20:36:30,000 kernel[0]: Change trust on
    15/02/15 20:36:30,000 kernel[0]: process name mdworker (pid 2917)
    15/02/15 20:37:34,000 kernel[0]: Change trust on
    15/02/15 20:37:34,000 kernel[0]: process name ��  ������9W������9W������9W������9W���� (pid 2859)
    15/02/15 20:37:34,000 kernel[0]: revoking trust for process 2859
    15/02/15 20:37:34,000 kernel[0]: Change trust on
    15/02/15 20:37:34,000 kernel[0]: process name ��H ����p�IX����i�IX����b�IX������IX���� (pid 2917)
    15/02/15 20:37:34,000 kernel[0]: revoking trust for process 2917
    15/02/15 20:38:30,000 kernel[0]: process 2942 set trusted
    15/02/15 20:38:30,000 kernel[0]: Change trust on
    15/02/15 20:38:30,000 kernel[0]: process name mdworker (pid 2942)
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    15/02/15 20:38:45,000 kernel[0]: process name  (pid 2719)
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    15/02/15 20:39:30,000 kernel[0]: process name ��  �����MfX�����MfX�����MfX�����MfX���� (pid 2942)
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    15/02/15 20:40:35,000 kernel[0]: Change trust on
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    15/02/15 20:41:51,000 bootlog[0]: BOOT_TIME 1424029311 0
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    18/02/15 10:20:39,000 kernel[0]: rooting via boot-uuid from /chosen: 65FD562A-2322-3761-B241-0F6D07DCF30F
    18/02/15 10:20:39,000 kernel[0]: Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
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    18/02/15 10:20:42,435 WindowServer[122]: Display 0x04272d40: GL mask 0x1; bounds (0, 0)[2560 x 1440], 39 modes available
    Main, Active, on-line, enabled, built-in, boot, Vendor 610, Model 9cb5, S/N 0, Unit 0, Rotation 0
    UUID 0x7eaceae36e58dbb8a1463bb9034010b9
    18/02/15 10:20:42,441 WindowServer[122]: Display 0x04272d40: GL mask 0x1; bounds (0, 0)[2560 x 1440], 39 modes available
    Main, Active, on-line, enabled, built-in, boot, Vendor 610, Model 9cb5, S/N 0, Unit 0, Rotation 0
    UUID 0x7eaceae36e58dbb8a1463bb9034010b9
    18/02/15 10:24:42,663 mds[60]: (Normal) Volume: volume:0x7f8d13871e00 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/firmwaresyncd.VZaTlM
    19/02/15 15:45:24,000 bootlog[0]: BOOT_TIME 1424357124 0
    EtreCheck version: 2.1.8 (121)
    Report generated 19 Feb 2015 15:51:03 GMT+1
    Download EtreCheck from http://etresoft.com/etrecheck
    Click the [Click for support] links for help with non-Apple products.
    Click the [Click for details] links for more information about that line.
    Hardware Information: ℹ️
        iMac (27-inch, Late 2009) (Technical Specifications)
        iMac - model: iMac11,1
        1 2.8 GHz Intel Core i7 CPU: 4-core
        16 GB RAM Upgradeable
            BANK 0/DIMM0
                4 GB DDR3 1067 MHz ok
            BANK 1/DIMM0
                4 GB DDR3 1067 MHz ok
            BANK 0/DIMM1
                4 GB DDR3 1067 MHz ok
            BANK 1/DIMM1
                4 GB DDR3 1067 MHz ok
        Bluetooth: Old - Handoff/Airdrop2 not supported
        Wireless:  en1: 802.11 a/b/g/n
    Video Information: ℹ️
        ATI Radeon HD 4850 - VRAM: 512 MB
            iMac 2560 x 1440
    System Software: ℹ️
        OS X 10.9.5 (13F34) - Time since boot: 0:5:29
    Disk Information: ℹ️
        WDC WD1001FALS-40U9B0 disk1 : (1 TB)
            EFI (disk1s1) <not mounted> : 210 MB
            Data (disk1s2) /Volumes/Data : 999.35 GB (291.53 GB free)
        OWC Mercury Electra 3G SSD disk0 : (240,06 GB)
            EFI (disk0s1) <not mounted> : 210 MB
            Macintosh HD (disk0s2) / : 239.71 GB (23.41 GB free)
    USB Information: ℹ️
        Razer Razer DeathAdder
        Apple Internal Memory Card Reader
        Apple Inc. BRCM2046 Hub
            Apple Inc. Bluetooth USB Host Controller
        Apple Computer, Inc. IR Receiver
        Apple Inc. Built-in iSight
    Firewire Information: ℹ️
        Stanton ScratchAmp 400mbit - 400mbit max
    Configuration files: ℹ️
        /etc/hosts - Count: 6
    Gatekeeper: ℹ️
        Anywhere
    Kernel Extensions: ℹ️
            /Applications/Parallels Desktop.app
        [not loaded]    com.parallels.kext.hypervisor (10.1.1 28614 - SDK 10.7) [Click for support]
        [not loaded]    com.parallels.kext.netbridge (10.1.1 28614 - SDK 10.7) [Click for support]
        [not loaded]    com.parallels.kext.usbconnect (10.1.1 28614 - SDK 10.7) [Click for support]
        [not loaded]    com.parallels.kext.vnic (10.1.1 28614 - SDK 10.7) [Click for support]
            /Applications/Proxifier.app
        [not loaded]    com.initex.proxifier.macosx.kext (2.11.2 - SDK 10.6) [Click for support]
            /Library/Extensions
        [not loaded]    com.caiaq.driver.NIUSBHardwareDriver (2.7.0 - SDK 10.9) [Click for support]
            /System/Library/Extensions
        [not loaded]    com.avira.kext.FileAccessControl (1.0.0d1 - SDK 10.9) [Click for support]
        [loaded]    com.delantis.kext.tcpblocknke (4.0.0 - SDK 10.8) [Click for support]
    Problem System Launch Agents: ℹ️
        [running]    com.paragon.NTFS.notify.plist [Click for support]
    Launch Agents: ℹ️
        [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
        [loaded]    com.paragon.updater.plist [Click for support]
        [running]    com.teamviewer.teamviewer.plist [Click for support]
        [running]    com.teamviewer.teamviewer_desktop.plist [Click for support]
    Launch Daemons: ℹ️
        [loaded]    com.adobe.fpsaud.plist [Click for support]
        [loaded]    com.adobe.SwitchBoard.plist [Click for support]
        [loaded]    com.delantis.tcbblockd.plist [Click for support]
        [loaded]    com.delantis.tcbblocknke_load_kext.plist [Click for support]
        [loaded]    com.delantis.TCPBlock.plist [Click for support]
        [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
        [loaded]    com.paragon.ntfs12.refresh.plist [Click for support]
        [loaded]    com.teamviewer.Helper.plist [Click for support]
        [running]    com.teamviewer.teamviewer_service.plist [Click for support]
    User Launch Agents: ℹ️
        [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
        [running]    com.delantis.tcpblocknotify.plist [Click for support]
        [loaded]    com.google.keystone.agent.plist [Click for support]
        [loaded]    com.valvesoftware.steamclean.plist [Click for support]
    User Login Items: ℹ️
        iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
        Dropbox    Application  (/Applications/Dropbox.app)
        Plex Media Server    Application  (/Applications/Plex Media Server.app)
        Espionage    Application  (/Applications/Espionage.app)
    Internet Plug-ins: ℹ️
        AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 [Click for support]
        FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
        QuickTime Plugin: Version: 7.7.3
        Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
        Default Browser: Version: 537 - SDK 10.9
        SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
        JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
    Safari Extensions: ℹ️
        Open in Internet Explorer
    3rd Party Preference Panes: ℹ️
        Flash Player  [Click for support]
        Native Instruments USB Audio  [Click for support]
        Paragon NTFS for Mac ® OS X  [Click for support]
        TCPBlock  [Click for support]
    Time Machine: ℹ️
        Time Machine not configured!
    Top Processes by CPU: ℹ️
             3%    WindowServer
             2%    Safari
             1%    com.apple.WebKit.Networking
             1%    fontd
             0%    loginwindow
    Top Processes by Memory: ℹ️
        189 MB    mds_stores
        189 MB    com.apple.WebKit.WebContent
        172 MB    com.apple.IconServicesAgent
        137 MB    Safari
        103 MB    Finder
    Virtual Memory Information: ℹ️
        11.88 GB    Free RAM
        3.58 GB    Active RAM
        618 MB    Inactive RAM
        1.09 GB    Wired RAM
        549 MB    Page-ins
        0 B    Page-outs
    Diagnostics Information: ℹ️
        Feb 19, 2015, 03:45:24 PM    Self test - passed
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    Can anyone help me and recommend what else should I do? This thing is quite annoying. My iMac is my workplace and constant freezes are frustrating.
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