I did run an Apple Hardware Test (from my original Install Disk 2). It showed no problems.
I have now run an Etrecheck report, as follows:-
EtreCheck version: 3.0.3 (307)
Report generated 2016-09-15 13:58:49
Download EtreCheck from https://etrecheck.com
Runtime 6:03
Performance: Below Average
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Other problem
Description:
Macbook pro randomly shutting down and having difficulty restarting. SMC and NVRAM resets often needed.
Hardware Information: ⓘ
MacBook Pro (17-inch, Early 2009)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro5,2
1 2.93 GHz Intel Core 2 Duo CPU: 2-core
8 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
4 GB DDR3 1067 MHz ok
BANK 1/DIMM0
4 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 24
Video Information: ⓘ
NVIDIA GeForce 9400M - VRAM: 256 MB
Color LCD 1920 x 1200
NVIDIA GeForce 9600M GT - VRAM: 512 MB
System Software: ⓘ
OS X Yosemite 10.10.5 (14F1912) - Time since boot: about 3 hours
Disk Information: ⓘ
ST9750420AS disk0 : (750.16 GB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 715.67 GB (119.98 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
10.6.8 (disk0s4) /Volumes/10.6.8 : 32.98 GB (17.37 GB free)
HL-DT-ST DVDRW GS21N ()
USB Information: ⓘ
Apple Inc. Built-in iSight
LaCie Rugged Mini USB 3.0 1 TB
EFI (disk1s1) <not mounted> : 210 MB
Mac Clone 1 (disk1s2) /Volumes/Mac Clone 1 : 999.21 GB (23.63 GB free)
Recovery HD (disk1s3) <not mounted> [Recovery]: 650 MB
Apple, Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Configuration files: ⓘ
/etc/hosts - Count: 23
Gatekeeper: ⓘ
Mac App Store and identified developers
Unknown Files: ⓘ
/Library/LaunchAgents/com.apple.NavService.plist
/Applications/Navionics World/NavService.app/Contents/MacOS/NavService -runMode ifneeded
One unknown file found. [Check files]
Kernel Extensions: ⓘ
/System/Library/Extensions
[not loaded] com.Analog.iokit.ADSLEthernetController (1.0.4 - 2016-09-13) [Support]
[not loaded] com.Analog.iokit.ADSLUSBModem (2.0.2 - 2016-09-13) [Support]
[not loaded] com.TMM.iokit.udslusb (3.0.2.2.6 - 2016-09-13) [Support]
[not loaded] com.avira.kext.FileAccessControl (1.0.0d1 - SDK 10.9 - 2016-09-13) [Support]
[not loaded] com.devguru.driver.SamsungComposite (1.2.61 - SDK 10.6 - 2016-09-13) [Support]
[not loaded] com.microsoft.driver.MicrosoftKeyboard (6.3 - 2016-09-13) [Support]
[not loaded] com.microsoft.driver.MicrosoftMouse (6.3 - 2016-09-13) [Support]
[not loaded] com.tascam.usb2audio.driver (2.00 - 2016-09-13) [Support]
[not loaded] jp.co.roland.RDUSB0009Dev (1.1.1 - 2016-09-13) [Support]
/System/Library/Extensions/MicrosoftKeyboard.kext/Contents/PlugIns
[not loaded] com.microsoft.driver.MicrosoftKeyboardBluetooth (6.3 - 2008-06-11) [Support]
[not loaded] com.microsoft.driver.MicrosoftKeyboardUSB (6.3 - 2008-06-11) [Support]
/System/Library/Extensions/MicrosoftMouse.kext/Contents/PlugIns
[not loaded] com.microsoft.driver.MicrosoftMouseBluetooth (6.3 - 2008-06-11) [Support]
[not loaded] com.microsoft.driver.MicrosoftMouseUSB (6.3 - 2008-06-11) [Support]
/System/Library/Extensions/TASCAM_US1xx.kext/Contents/PlugIns
[not loaded] com.tascam.usb2audio.driver_TIGER (2.00 - 2009-12-15) [Support]
/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
[not loaded] com.devguru.driver.SamsungACMControl (1.2.61 - SDK 10.6 - 2013-02-14) [Support]
[not loaded] com.devguru.driver.SamsungACMData (1.2.61 - SDK 10.6 - 2013-02-14) [Support]
[not loaded] com.devguru.driver.SamsungMTP (1.2.61 - SDK 10.5 - 2013-02-14) [Support]
[not loaded] com.devguru.driver.SamsungSerial (1.2.61 - SDK 10.6 - 2013-02-14) [Support]
Startup Items: ⓘ
ADSLAutoConfig: Path: /Library/StartupItems/ADSLAutoConfig
ParallelsDesktopTransporter: Path: /Library/StartupItems/ParallelsDesktopTransporter
RetroRun: Path: /Library/StartupItems/RetroRun
Startup items are obsolete in OS X Yosemite
System Launch Agents: ⓘ
[not loaded] 6 Apple tasks
[loaded] 145 Apple tasks
[running] 61 Apple tasks
System Launch Daemons: ⓘ
[not loaded] 46 Apple tasks
[loaded] 135 Apple tasks
[running] 81 Apple tasks
Launch Agents: ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (2015-10-05) [Support]
[loaded] com.adobe.CS4ServiceManager.plist (2009-03-14) [Support]
[failed] com.apple.NavService.plist (2012-02-10) [Support]
[loaded] com.google.keystone.agent.plist (2016-07-12) [Support]
[loaded] com.intego.backupassistant.agent.plist (2012-10-24) [Support]
[running] com.trusteer.rapport.rapportd.plist (2016-07-18) [Support]
[running] com.wdc.raidmanagerstatusmenu.plist (2013-11-11) [Support]
[loaded] org.macosforge.xquartz.startx.plist (2016-05-05) [Support]
Launch Daemons: ⓘ
[failed] com.adobe.fpsaud.plist (2016-04-05) [Support]
[loaded] com.adobe.versioncueCS4.plist (2009-03-15) [Support]
[running] com.backblaze.bzserv.plist (2016-07-11) [Support]
[loaded] com.bombich.ccc.plist (2011-02-19) [Support]
[running] com.bombich.ccchelper.plist (2014-12-23) [Support]
[loaded] com.cyberghostsrl.CyberghostPrivilegedHelper.plist (2014-12-30) [Support]
[running] com.fawkes.RipCore.plist (2008-08-13) [Support]
[loaded] com.google.keystone.daemon.plist (2016-09-02) [Support]
[running] com.intego.BackupAssistant.daemon.plist (2012-10-24) [Support]
[running] com.trusteer.rooks.rooksd.plist (2016-07-18) [Support]
[running] com.wdc.WDRAIDDriveService.plist (2013-11-11) [Support]
[loaded] com.westerndigital.WD-Drive-Manager-Installer.plist (2014-10-16) [Support]
[loaded] org.macosforge.xquartz.privileged_startx.plist (2016-05-05) [Support]
User Launch Agents: ⓘ
[failed] NavService.plist (2014-02-15) [Support]
[loaded] com.adobe.AAM.Updater-1.0.plist (2015-10-05) [Support]
[failed] com.adobe.ARM.[...].plist (2016-02-13) [Support]
[loaded] com.adobe.ARM.[...].plist (2010-03-17) [Support]
[running] com.amazon.music.plist (2014-12-11) [Support]
[running] com.backblaze.bzbmenu.plist (2016-09-14) [Support]
[failed] com.zeobit.MacKeeper.Helper.plist (2014-08-02) [Support]
[running] org.Navionics.NavService.plist (2016-07-05) [Support]
User Login Items: ⓘ
MicrosoftMouseHelper Application (/Library/PreferencePanes/Microsoft Mouse.prefPane/Contents/Resources/MicrosoftMouseHelper.app)
MicrosoftKeyboardHelper Application (/Library/PreferencePanes/Microsoft Keyboard.prefPane/Contents/Resources/MicrosoftKeyboardHelper.app)
Dropbox Application (/Applications/Dropbox.app)
CCC User Agent Application (/Applications/Carbon Copy Cloner.app/Contents/Library/LoginItems/CCC User Agent.app)
fuspredownloader Application Hidden (~/Library/Application Support/.FUS/fuspredownloader.app)
Internet Plug-ins: ⓘ
Google Earth Web Plug-in: 7.1 (2013-10-07) [Support]
Default Browser: 600 - SDK 10.10 (2015-07-17)
Flip4Mac WMV Plugin: 2.3.4.1 (2010-06-15) [Support]
OfficeLiveBrowserPlugin: 12.3.6 (2013-03-22) [Support]
AdobeAAMDetect: AdobeAAMDetect 1.0.0.0 - SDK 10.6 (2015-10-05) [Support]
FlashPlayer-10.6: 21.0.0.213 - SDK 10.6 (2016-04-07) [Support]
NavIn: NavIn 1.0.0.0 - SDK 10.0 (2013-01-18) [Support]
Silverlight: 4.0.50401.0 (2011-02-13) [Support]
QuickTime Plugin: 7.7.3 (2016-09-02)
Flash Player: 21.0.0.213 - SDK 10.6 (2016-04-07) Outdated! Update
iPhotoPhotocast: 7.0 (2011-02-19)
eMusicRemote: Unknown (2009-03-11) [Support]
AdobePDFViewer: 9.5.5 (2013-05-20) [Support]
npNavLaunch: NavLaunch_x86_64 1.0.0.0 - SDK 10.6 (2014-02-15) [Support]
Scorch: 5.2.5 (2009-03-10) [Support]
eMusic: Unknown (2008-09-11)
JavaAppletPlugin: 15.0.1 - SDK 10.7 (2014-10-06) Check version
User internet Plug-ins: ⓘ
CitrixOnlineWebDeploymentPlugin: 1.0.105 (2013-04-26) [Support]
Safari Extensions: ⓘ
DuckDuckGo - DuckDuckGo - http://duckduckgo.com (2015-07-10)
Audio Plug-ins: ⓘ
TASCAM_US1xx: Unknown (2009-12-15) [Support]
3rd Party Preference Panes: ⓘ
Adobe Version Cue CS4 (2009-03-15) [Support]
APE Manager (2009-03-11)
Backblaze Backup (2016-07-11) [Support]
Déjà Vu (2009-03-11) [Support]
Flash Player (2016-04-05) [Support]
Flip4Mac WMV (2010-06-15) [Support]
MacFUSE (2010-01-29) [Support]
Microsoft Keyboard (2009-03-13) [Support]
Microsoft Mouse (2009-03-13) [Support]
Perian (2011-02-13) [Support]
Trusteer Endpoint Protection (2016-08-07) [Support]
Time Machine: ⓘ
Skip System Files: NO
Mobile backups: ON
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 715.67 GB Disk used: 595.69 GB
Destinations:
MyBook [Local]
Total size: 999.85 GB
Total number of backups: 74
Oldest backup: 06/11/2015 14:56
Last backup: 14/09/2016 10:30
Size of backup disk: Too small
Backup size 999.85 GB < (Disk used 595.69 GB X 3)
Top Processes by CPU: ⓘ
7% WindowServer
1% kernel_task
1% mtmfs
0% Google Chrome Helper(6)
0% fontd
Top Processes by Memory: ⓘ
1.08 GB Google Chrome Helper(6)
677 MB kernel_task
262 MB Google Chrome
246 MB mds_stores
188 MB mdworker(6)
Virtual Memory Information: ⓘ
1.30 GB Free RAM
6.70 GB Used RAM (3.06 GB Cached)
0 B Swap Used
Diagnostics Information: ⓘ
Sep 15, 2016, 09:57:15 AM Self test - passed
Sep 13, 2016, 06:22:19 PM /Library/Logs/DiagnosticReports/NavService_2016-09-13-182219_[redacted].cpu_res ource.diag [Details]
/Applications/Chart Installer/NavService.app/Contents/MacOS/NavService
Any clues there?