27" iMac freezing daily (late 2009)

Question

Been having this problem for a long time...through at least 3-4 OS versions, and prior to a recall HD replacement iirc. No apparent rhyme or reason....it just locks up, including the cursor with no warning and requires a power cycle to restart. No forewarning or apparent odd behavior (aside of a general lagginess and regular beachballs that I'm guessing is more to do with it's age than anything) The only common condition I can think of it that it's always when Safari is running and being used, but since that's pretty much always the case, I don't see it as a critical data point.
It happens roughly daily, but that's likely more based on my typical usage and would increase or decrease as such. I've seen a few similar issues posted in random searches over the years, but never a solid resolution to those cases. There is lots of log activity in the seconds prior to or during these crashes, but is sadly all Greek to me.   Here is a text file of that period from today if it helps: crash0218.rtf
Spec-wise, it's a 2.8 i7, 1TB(@ prob 93% full), 8GB, ATI 4850 (512)
I keep hoping that each new OS or Safari version will magically correct it, but it doesn't seem like that's going to happen, haha, so I'd appreciate any ideas or input as this is becoming really frustrating and I'd really like to get another year or so out of this machine if possible.

Answer 1

Thanks for the responses.
The OS is current, just an old signature.
I've definitely had TuneUp (iTunes tagging utility) a long time, but don't remember seeing weird activity from it in the past. It's a fairly new version (~3 days) so there might be some permissions issues with it or something? It wasn't running at the time, nor was iTunes.
Here are the Etrecheck results:
Hardware Information: ℹ️
    iMac (27-inch, Late 2009) (Technical Specifications)
    iMac - model: iMac11,1
    1 2.8 GHz Intel Core i7 CPU: 4-core
    8 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 0/DIMM1
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM1
            2 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 10.10.2 (14C109) - Time since boot: 0:6:15
Disk Information: ℹ️
    ST31000528AS disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.35 GB (88.48 GB free)
        Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
    HL-DT-ST DVDRW  GA11N 
USB Information: ℹ️
    Apple, Inc. Keyboard Hub
        Logitech USB Receiver
        Apple, Inc Apple Keyboard
    TS-RDF5 Transcend
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Logitech USB Receiver
    Apple Inc. Built-in iSight
    Apple Computer, Inc. IR Receiver
Firewire Information: ℹ️
    OEM ATA Device 00 800mbit - 800mbit max
        EFI (disk1s1) <not mounted> : 210 MB
        Time Machine (disk1s2) /Volumes/Time Machine : 2.00 TB (657.09 GB free)
Configuration files: ℹ️
    /etc/hosts - Count: 15
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /Applications/TemperatureMonitor.app
    [not loaded]    com.bresink.driver.BRESINKx86Monitoring (9.0) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.Belcarra.iokit.USBLAN_netpart (2.0.2) [Click for support]
    [not loaded]    com.Belcarra.iokit.USBLAN_usbpart (2.0.2) [Click for support]
    [loaded]    com.Logitech.Control Center.HID Driver (3.5.1 - SDK 10.0) [Click for support]
    [loaded]    com.Logitech.Unifying.HID Driver (1.2.0 - SDK 10.0) [Click for support]
    [not loaded]    com.RemoteControl.USBLAN.usbpart (2.0.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungComposite (1.2.61 - SDK 10.6) [Click for support]
        /System/Library/Extensions/Belcarra.USBLAN_netpart.kext/Contents/PlugIns
    [not loaded]    com.belcarra.iokit.netpart.panther (1.6.1) [Click for support]
        /System/Library/Extensions/Belcarra.USBLAN_usbpart.kext/Contents/PlugIns
    [not loaded]    com.belcarra.iokit.usbpart.panther (1.6.1) [Click for support]
        /System/Library/Extensions/RemoteControl.USBLAN_usbpart.kext/Contents/PlugIns
    [not loaded]    com.RemoteControl.USBLAN.panther (1.6.1) [Click for support]
        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.SamsungACMControl (1.2.61 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungACMData (1.2.61 - SDK 10.6) [Click for support]
    [not loaded]    com.devguru.driver.SamsungMTP (1.2.61 - SDK 10.5) [Click for support]
    [not loaded]    com.devguru.driver.SamsungSerial (1.2.61 - SDK 10.6) [Click for support]
        /Users/[redacted]/Documents/WD MyBook/Extras/WD +TURBO Installer.app
    [not loaded]    com.wdc.driver.1394HP (1.0.9) [Click for support]
    [not loaded]    com.wdc.driver.USBHP (1.0.11) [Click for support]
Startup Items: ℹ️
    TuxeraNTFSUnmountHelper: Path: /Library/StartupItems/TuxeraNTFSUnmountHelper
    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
    [loaded]    com.adobe.CS4ServiceManager.plist [Click for support]
    [running]    com.brother.LOGINserver.plist [Click for support]
    [loaded]    com.divx.dms.agent.plist [Click for support]
    [loaded]    com.divx.update.agent.plist [Click for support]
    [running]    com.gopro.stereomodestatus.plist [Click for support]
    [running]    com.Logitech.Control Center.Daemon.plist [Click for support]
    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.bombich.ccc.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
    [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
User Login Items: ℹ️
    Garmin Lifetime Map Updater    Application  (/Applications/Garmin Lifetime Map Updater.app)
    Camouflage    Application  (/Incompatible Software/Camouflage.app)
    Dropbox    Application  (/Applications/Dropbox.app)
    Spotify    Application  (/Applications/Spotify.app)
    fuspredownloader    Application Hidden (/Users/[redacted]/Library/Application Support/.FUS/fuspredownloader.app)
Internet Plug-ins: ℹ️
    OVSHelper: Version: 1.1 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Flip4Mac WMV Plugin: Version: 3.1.0.24   - SDK 10.8 [Click for support]
    Google Earth Web Plug-in: Version: 6.0 [Click for support]
    SlingPlayer: Version: Unknown - SDK 10.8 [Click for support]
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    DivX Web Player: Version: 3.2.4.1250 - SDK 10.6 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    iPhotoPhotocast: Version: 7.0 - SDK 10.8
    AdobePDFViewer: Version: 9.5.5 [Click for support]
    GarminGpsControl: Version: 4.0.2.6 Beta - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
    Picasa: Version: 1.0 [Click for support]
Safari Extensions: ℹ️
    AdBlock
    Social Fixer
    Add To Amazon Wish List
3rd Party Preference Panes: ℹ️
    Cineform  [Click for support]
    Flash Player  [Click for support]
    Flip4Mac WMV  [Click for support]
    FUSE for OS X (OSXFUSE)  [Click for support]
    Growl  [Click for support]
    Java  [Click for support]
    Logitech Control Center  [Click for support]
    MacFUSE  [Click for support]
    MediaLink  [Click for support]
    NTFS-3G  [Click for support]
    Perian  [Click for support]
    Tuxera NTFS  [Click for support]
Time Machine: ℹ️
    Mobile backups: OFF
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 999.35 GB Disk used: 910.86 GB
    Destinations:
        Time Machine [Local]
        Total size: 2.00 TB
        Total number of backups: 83
        Oldest backup: 2014-01-04 06:01:53 +0000
        Last backup: 2015-02-19 02:57:02 +0000
        Size of backup disk: Too small
            Backup size 2.00 TB < (Disk used 910.86 GB X 3)
Top Processes by CPU: ℹ️
         2%    WindowServer
         0%    fontd
         0%    askpermissiond
Top Processes by Memory: ℹ️
    172 MB    mds_stores
    129 MB    ocspd
    94 MB    Finder
    77 MB    Dropbox
    52 MB    Dock
Virtual Memory Information: ℹ️
    5.75 GB    Free RAM
    1.60 GB    Active RAM
    530 MB    Inactive RAM
    701 MB    Wired RAM
    1.25 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 18, 2015, 08:50:15 PM    Self test - passed
    Feb 15, 2015, 10:12:31 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-02-15-221231_[reda cted].crash