Macbookpro8,1 random shutdowns under latest version of Yosemite

Question

I've seen lots of posts about this, but no answers. My MBP (13" late 2011) shuts down randomly and intermittently (sometimes it works fine for an extended period). No indication of a kernel panic, when I start up again there is no dialog about shutting down improperly or crashing. I've run the original Apple Hardware Test, as well as all the hardware tests on the new TechTool 8 (memory, motherboard, fans, sensors, battery, etc.) and used SMART Utility to check my drives (I have two OWC SSDs installed). I've opened up the case and blown out the dust and reseated the memory and all cables. I've reset the SMC and PRAM. I've travelled with my laptop a lot this year and it's been jarred plenty but nothing appears to be wrong. I don't know what to do next, and the problem is intermittent enough that it will probably be hard for Apple to track down.
Any ideas?
EtreCheck version: 2.2 (132)
Report generated 4/23/15, 12:27 PM
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Hardware Information: ℹ️
    MacBook Pro (13-inch, Early 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.7 GHz Intel Core i7 CPU: 2-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            8 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            8 GB DDR3 1600 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless:  en1: 802.11 a/b/g/n
    Battery: Health = Normal - Cycle count = 276 - SN = W01265LKSD3BA
Video Information: ℹ️
    Intel HD Graphics 3000
        Color LCD 1280 x 800
System Software: ℹ️
    OS X 10.10.3 (14D136) - Time since boot: 3:15:16
Disk Information: ℹ️
    OWC Mercury EXTREME Pro 6G SSD disk1 : (480.1 GB)
        EFI (disk1s1) <not mounted> : 210 MB
        Macintosh HD (disk1s2) / : 479.11 GB (47.46 GB free)
        Recovery HD (disk1s3) <not mounted>  [Recovery]: 650 MB
    Samsung SSD 840 EVO 750GB disk0 : (750.16 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Audio HD (disk0s2) /Volumes/Audio HD : 701.51 GB (266.12 GB free)
        Recovery HD (disk0s4) <not mounted>  [Recovery]: 650 MB
        Repair Partition (disk2) /Volumes/Repair Partition : 47.28 GB (17.25 GB free)
            Core Storage: disk0s3 47.65 GB Online
USB Information: ℹ️
    Apple Computer, Inc. IR Receiver
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Configuration files: ℹ️
    /etc/sysctl.conf - Exists
    /etc/hosts - Count: 1
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /Applications/ExpressVPN.app
    [not loaded]    expressvpn.tap (1.0) [Click for support]
    [not loaded]    expressvpn.tun (1.0) [Click for support]
        /Applications/Internet/Transmit.app
    [not loaded]    com.panic.TransmitDisk.transmitdiskfs (4.0.0 - SDK 10.6) [Click for support]
        /Applications/Karabiner.app
    [not loaded]    org.pqrs.driver.Karabiner (10.6.0 - SDK 10.10) [Click for support]
        /Applications/TechTool Pro 8.app
    [not loaded]    com.micromat.driver.spdKernel (1 - SDK 10.10) [Click for support]
    [not loaded]    com.micromat.driver.spdKernel-10-8 (1 - SDK 10.10) [Click for support]
        /Applications/Toast 11 Titanium/Toast Titanium.app
    [not loaded]    com.roxio.TDIXController (2.0) [Click for support]
        /Library/Extensions
    [not loaded]    com.motu.driver.FireWireAudio (1.6 64254 - SDK 10.4) [Click for support]
    [not loaded]    com.motu.driver.MicroBookAudio (1.6 64254 - SDK 10.4) [Click for support]
    [not loaded]    com.motu.driver.PCIAudio (1.6 64254 - SDK 10.4) [Click for support]
    [not loaded]    com.motu.driver.USBMidiKext (1.6 64820 - SDK 10.4) [Click for support]
    [loaded]    jp.plentycom.driver.SteerMouse (4.2.1 - SDK 10.6) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.AmbrosiaSW.AudioSupport (4.1.2 - SDK 10.6) [Click for support]
    [loaded]    com.Cycling74.driver.Soundflower (1.5.1) [Click for support]
    [not loaded]    com.FTDI.driver.FTDIUSBSerialDriver (2.2.14) [Click for support]
    [not loaded]    com.HID.driver.1394button (1.0.0d1) [Click for support]
    [not loaded]    com.IKMultimedia.driver.StompIO1 (1.0.0) [Click for support]
    [not loaded]    com.SiliconImage.driver.Si3132r5 (1.5.16) [Click for support]
    [not loaded]    com.aliph.driver.jstub (1.1.2 - SDK 10.7) [Click for support]
    [not loaded]    com.contourdesign.driver.shuttle (2.2) [Click for support]
    [loaded]    com.digidesign.iokit.DigiDal (9.0.6f4 - SDK 10.5) [Click for support]
    [loaded]    com.hzsystems.terminus.driver (4) [Click for support]
    [not loaded]    com.ikmultimedia.driver.StealthPedal (1.0.0) [Click for support]
    [loaded]    com.musiclab.driver.molcp3 (3.3.9) [Click for support]
    [not loaded]    com.paceap.kext.pacesupport.master (5.9.1 - SDK 10.6) [Click for support]
    [not loaded]    com.palm.ClassicNotSeizeDriver (3.2.1) [Click for support]
    [not loaded]    com.roxio.BluRaySupport (1.1.3) [Click for support]
    [not loaded]    com.wdc.driver.1394HP (1.0.11 - SDK 10.4) [Click for support]
    [not loaded]    com.wdc.driver.1394_64HP (1.0.1 - SDK 10.6) [Click for support]
    [not loaded]    com.wdc.driver.USBHP (1.0.11) [Click for support]
    [loaded]    com.wdc.driver.USB_64HP (1.0.0 - SDK 10.6) [Click for support]
        /System/Library/Extensions/PACESupportFamily.kext/Contents/PlugIns
    [not loaded]    com.paceap.kext.pacesupport.leopard (5.9.1 - SDK 10.4) [Click for support]
    [not loaded]    com.paceap.kext.pacesupport.panther (5.9.1 - SDK 10.-1) [Click for support]
    [loaded]    com.paceap.kext.pacesupport.snowleopard (5.9.1 - SDK 10.6) [Click for support]
    [not loaded]    com.paceap.kext.pacesupport.tiger (5.9.1 - SDK 10.4) [Click for support]
        /Volumes/Repair Partition/Applications/Utilities/DiskWarrior.app
    [not loaded]    com.alsoft.Preview (5 - SDK 10.5) [Click for support]
Startup Items: ℹ️
    MolCp3Startup: Path: /System/Library/StartupItems/MolCp3Startup
    DigidesignLoader: Path: /Library/StartupItems/DigidesignLoader
    HP IO: Path: /Library/StartupItems/HP IO
    IntegoCommon: Path: /Library/StartupItems/IntegoCommon
    RetroRun: Path: /Library/StartupItems/RetroRun
    SATARaid5Daemon: Path: /Library/StartupItems/SATARaid5Daemon
    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.amazon.sendtokindle.launcher.plist [Click for support]
    [loaded]    com.epson.esua.launcher.plist [Click for support]
    [running]    com.epson.eventmanager.agent.plist [Click for support]
    [running]    com.folabs.proremote.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.hp.devicemonitor.plist [Click for support]
    [running]    com.intego.commonservices.integomenu.plist [Click for support]
    [loaded]    com.intego.commonservices.taskmanager.plist [Click for support]
    [loaded]    com.intego.commonservices.uninstaller.plist [Click for support]
    [loaded]    com.intego.netbarrier.alert.plist [Click for support]
    [running]    com.intego.netupdate.agent.plist [Click for support]
    [loaded]    com.intego.virusbarrier.alert.plist [Click for support]
    [not loaded]    com.maintain.LogOut.plist [Click for support]
    [not loaded]    com.maintain.PurgeInactiveMemory.plist [Click for support]
    [not loaded]    com.maintain.Restart.plist [Click for support]
    [not loaded]    com.maintain.ShutDown.plist [Click for support]
    [not loaded]    com.maintain.Sleep.plist [Click for support]
    [running]    com.maintain.SystemEvents.plist [Click for support]
    [running]    com.micromat.TechToolProAgent.plist [Click for support]
    [running]    com.motu.MOTULauncher.plist [Click for support]
    [running]    com.retrospect.clientapp.plist [Click for support]
    [loaded]    org.macosforge.xquartz.startx.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.ambrosiasw.ambrosiaaudiosupporthelper.daemon.plist [Click for support]
    [loaded]    com.avid.bsd.DigiShoeTool.plist [Click for support]
    [loaded]    com.avid.bsd.shoe.plist [Click for support]
    [loaded]    com.avid.bsd.ShoeTool.plist [Click for support]
    [loaded]    com.barebones.authd.plist [Click for support]
    [loaded]    com.barebones.bbedit.plist [Click for support]
    [loaded]    com.bombich.ccc.plist [Click for support]
    [loaded]    com.coriolis-systems.Downloader.install.plist [Click for support]
    [running]    com.crashplan.engine.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [running]    com.intego.commonservices.daemon.integod.plist [Click for support]
    [running]    com.intego.commonservices.daemon.taskmanager.plist [Click for support]
    [loaded]    com.intego.commonservices.icalserver.plist [Click for support]
    [loaded]    com.intego.commonservices.metrics.kschecker.plist [Click for support]
    [running]    com.intego.netbarrier.daemon.logger.plist [Click for support]
    [running]    com.intego.netbarrier.daemon.monitor.plist [Click for support]
    [running]    com.intego.netbarrier.daemon.plist [Click for support]
    [running]    com.intego.netupdate.daemon.plist [Click for support]
    [loaded]    com.intego.virusbarrier.daemon.emlparser.plist [Click for support]
    [loaded]    com.intego.virusbarrier.daemon.logger.plist [Click for support]
    [running]    com.intego.virusbarrier.daemon.plist [Click for support]
    [loaded]    com.intego.virusbarrier.daemon.scanner.plist [Click for support]
    [loaded]    com.macpaw.CleanMyMac2.Agent.plist [Click for support]
    [not loaded]    com.maintain.AutoLoginUserScreenLocked.plist [Click for support]
    [not loaded]    com.maintain.HideSpotlightMenuBarIcon.plist [Click for support]
    [running]    com.micromat.TechToolProDaemon.plist [Click for support]
    [running]    com.paceap.eden.licensed.plist [Click for support]
    [loaded]    com.prosofteng.DriveGenius.locum.plist [Click for support]
    [running]    com.retrospect.retroclient.plist [Click for support]
    [running]    com.retrospect.retroengine.plist [Click for support]
    [loaded]    com.rogueamoeba.instanton-agent.plist [Click for support]
    [running]    com.tunabellysoftware.TGFanHelper.plist [Click for support]
    [loaded]    org.macosforge.xquartz.privileged_startx.plist [Click for support]
    [loaded]    PACESupport.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [running]    com.amazon.music.plist [Click for support]
    [running]    com.c-command.SpamSieve.LaunchAgent.plist [Click for support]
    [failed]    com.citrixonline.GoToMeeting.G2MUpdate.plist [Click for support] [Click for details]
    [loaded]    com.facebook.videochat.[redacted].plist [Click for support]
    [failed]    com.lastpass.LastPassHelper.plist [Click for support] [Click for details]
    [loaded]    com.maintain.ShowUserLibraryDirectory.plist [Click for support]
    [running]    com.prosofteng.DGMonitor.plist [Click for support]
    [running]    com.spotify.webhelper.plist [Click for support]
    [running]    ws.agile.1PasswordAgent.plist [Click for support]
User Login Items: ℹ️
    Rogue Amoeba Schedule Helper    Application  (/Library/Application Support/Audio Hijack Pro/Rogue Amoeba Schedule Helper.app)
    textsoapAgent    Application  (/Users/[redacted]/Library/Application Support/TextSoap/textsoapAgent.app)
    Butler    Application  (/Applications/Butler.app)
    Jawbone Updater    Application  (/Applications/Jawbone Updater.app)
    Google Drive    Application  (/Applications/Google Drive.app)
    Dropbox    Application  (/Applications/Dropbox.app)
    WDDriveUtilityHelper    Application  (/Applications/Utilities/Western Digital/WD Drive Utilities.app/Contents/WDDriveUtilityHelper.app)
    WDSecurityHelper    Application  (/Applications/Utilities/Western Digital/WD Security.app/Contents/WDSecurityHelper.app)
    Hightail Desktop App    Application  (/Applications/Hightail Desktop App.app)
    AdobeResourceSynchronizer    Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
    SteerMouse Manager    Application  (/Applications/Utilities/SteerMouse.app/Contents/MacOS/SteerMouse Manager.app)
    TomTomHOMERunner    Application Hidden (/Users/[redacted]/Library/Application Support/TomTom HOME/TomTomHOMERunner.app)
    CrashPlan menu bar    Application  (/Applications/CrashPlan.app/Contents/Helpers/CrashPlan menu bar.app)
    EvernoteHelper    Application  (/Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)
Internet Plug-ins: ℹ️
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    Aspera Web: Version: Unknown [Click for support]
    iLokClientHelper: Version: 3.6 - SDK 10.5 [Click for support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
    WidevineMediaOptimizer: Version: 6.0.0.12757 - SDK 10.7 [Click for support]
    googletalkbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
    MacCouponPrinter2: Version: Unknown
    Scorch: Version: Unknown - SDK 10.2 [Click for support]
    iPhotoPhotocast: Version: 7.0 - SDK 10.7
    RealPlayer Plugin: Version: Unknown [Click for support]
    PDF Browser Plugin: Version: 2.4.4 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    AmazonMP3DownloaderPlugin1017287: Version: Unknown
    AmazonMP3DownloaderPlugin: Version: Unknown
    nplastpass: Version: 3.1.89 - SDK 10.10 [Click for support]
    Musicnotes: Version: 1.18.9 [Click for support]
    RhapsodyPlayerEngine: Version: 1.1.0 [Click for support]
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Flip4Mac WMV Plugin: Version: 3.3.4.4   - SDK 10.7 [Click for support]
    o1dbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
    OfficeLiveBrowserPlugin: Version: 12.3.6 [Click for support]
User internet Plug-ins: ℹ️
    CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Click for support]
    EMusic: Version: EMusic 1.0.0 [Click for support]
    Folx3Plugin: Version: Unknown
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
Safari Extensions: ℹ️
    1Password
    LastPass
    Evernote Web Clipper
    Folx

Answer 1

That Mac has been hobbled by a plethora of ill-conceived junk. Its memory is also the incorrect speed for that model Mac, which can cause unexpected behavior and crashes. Replace it with correct memory. Other than Apple I can recommend only two sources of Mac memory: OWC / MacSales, and Crucial. Other, PC-centric vendors generally sell memory that does not meet Apple's stringent specifications.
Software: at a minimum, "CleanMyMac", "Cocktail", "Drive Genius", "Intego" and "TechTool Pro" must be removed. Refer to their individual uninstallation instructions and include the comments that follow the horizontal line below.
Reinstalling OS X will have no effect.
In addition, that Mac's Hosts file appears to have been modified. Fixing a modified Hosts file requires specific instructions. Apple Support Communities contributor and EtreCheck author etresoft recently added a User Tip discussing that concern, and how to correct it: Fixing a hacked /etc/hosts file
It is not reasonable to expect a Mac to operate normally after using CleanMyMac. Like many ill-conceived "cleaning" utilities, it is capable of corrupting a Mac to the point that erasing it completely is the only practicable means of recovery. CleanMyMac is not the only example; it is merely popular due to marketing strategies that are as effective as they are intrusive.
There is no practicable way to reverse the effects of having used CleanMyMac2 other than to reinstall all affected files from backups or their original sources. Its developer's uninstallation instructions are ineffective despite their recent claims to the contrary. Only MacPaw, its developer, can know the reason for that, but I can think of two possibilities: either they are purposefully leaving components behind for reasons known only to them, or they simply don't know what they're doing. Neither one of those possibilities is particularly comforting for the user.
Reinstalling OS X alone will have no effect on either removing CleanMyMac or reversing the damage it is capable of inflicting upon a system.
Follow the applicable recovery procedure below:
If you have a backup that you created prior to using CleanMyMac, now is the time to use it. For Time Machine, boot OS X Recovery, and at the Mac OS X Utilities screen, choose Restore from Time Machine Backup. Choose a date preceding the installation of CleanMyMac.
If you do not have a backup that predates the use of CleanMyMac, create one now. To do that read Mac Basics: Time Machine backs up your Mac.
The recovery procedure will require that you erase the Mac using OS X Recovery, and then create a new user whose contents will be empty. You will then be able to use Setup Assistant to migrate your essential documents including photos, music, work products and other essential files.
When doing so, select only your previous User account and do not select "Applications", "Computer and Network Settings" or "Other files and folders". De-select those choices.
Subsequent to using Setup Assistant, you will need to reinstall the essential software you may require, once again remembering to install software only from their original sources, and omitting all non-essential software.
"Non-essential software" is a broad category that includes but is not limited to third party "cleaning", "maintenance", and "anti-virus" products.
To erase and install Yosemite read: OS X Yosemite: Erase and reinstall OS X
To migrate your essential documents read: OS X Yosemite: Transfer your info from a computer or storage device and follow the procedure under Transfer info from a Time Machine backup or other storage device.