Macbook Pro Running Very Slowly

Question

Lately, my Macbook Pro has been running very slowly. The rainbow wheel keeps popping up and it takes a very long time to open windows or quit applications. Also, the computer gets really slowly even if only a few applications are open (e.g. Microsoft Word and iTunes). This problem has started recently, a few months after installing OSX 10.9.5. I don't know if this is the problem, if the hard drive needs to be cleared, some programs are taking up too much RAM, or if the computer is just getting old. Any help would be appreciated, and I have included the EtreCheck below as well.
EtreCheck version: 2.1.8 (121)
Report generated February 20, 2015 at 11:56:30 AM EST
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
    MacBook Pro (13-inch, Late 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless:  en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 1000
Video Information: ℹ️
    Intel HD Graphics 3000 - VRAM: 384 MB
        Color LCD 1280 x 800
System Software: ℹ️
    OS X 10.9.5 (13F34) - Time since boot: 7 days 23:24:10
Disk Information: ℹ️
    ST9500325ASG disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 499.25 GB (165.99 GB free)
        Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
    HL-DT-ST DVDRW  GS31N 
USB Information: ℹ️
    Apple Computer, Inc. IR Receiver
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. FaceTime HD Camera (Built-in)
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.motorola-mobility.driver.MotMobileUSB (1.2.0 - SDK 10.5) [Click for support]
    [not loaded]    com.usboverdrive.driver.hid (3.0.1) [Click for support]
    [not loaded]    com.veltrop.taylor.driver.virtualhid (1.1) [Click for support]
        /System/Library/Extensions/MotMobileUSB.kext/Contents/PlugIns
    [not loaded]    com.motorola-mobility.driver.MotMobileMS (1.0.0 - SDK 10.5) [Click for support]
    [not loaded]    com.motorola-mobility.driver.MotMobileMTP (1.2.0 - SDK 10.5) [Click for support]
    [not loaded]    com.motorola-mobility.driver.MotMobileUSBLAN (1.2.0 - SDK 10.5) [Click for support]
    [not loaded]    com.motorola-mobility.driver.MotMobileUSBLANMerge (1.2.0 - SDK 10.5) [Click for support]
    [not loaded]    com.motorola-mobility.driver.MotMobileUSBSwch (1.2.0 - SDK 10.5) [Click for support]
        /System/Library/Extensions/USBOverdrive.kext/Contents/PlugIns
    [not loaded]    com.usboverdrive.driver.hid.safe (3.0.1) [Click for support]
Startup Items: ℹ️
    ChmodBPF: Path: /Library/StartupItems/ChmodBPF
    Startup items are obsolete in OS X Yosemite
Problem System Launch Daemons: ℹ️
    [failed]    com.apple.AOSNotificationOSX.plist [Click for details]
    [failed]    com.apple.wdhelper.plist
Launch Agents: ℹ️
    [running]    com.brother.LOGINserver.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    com.motorola.motohelper.plist [Click for support]
    [loaded]    com.motorola.motohelperUpdater.plist [Click for support]
    [loaded]    com.oracle.java.Java-Updater.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.barebones.textwrangler.plist [Click for support]
    [loaded]    com.github.GitHub.GHInstallCLI.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [running]    com.motorola-mobility.mmcfgd.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
    [loaded]    org.macosforge.xquartz.privileged_startx.plist [Click for support]
User Launch Agents: ℹ️
    [failed]    com.adobe.ARM.[...].plist [Click for support]
    [failed]    com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist
    [failed]    com.bitcasa.BitcasaUI.plist [Click for support]
    [loaded]    com.BlueStacks.AppPlayer.LogRotator.plist [Click for support]
    [loaded]    com.BlueStacks.AppPlayer.Service.plist [Click for support]
    [loaded]    com.BlueStacks.AppPlayer.UninstallAgent.plist [Click for support]
    [loaded]    com.BlueStacks.AppPlayer.UpdaterAgent.plist [Click for support]
    [loaded]    com.valvesoftware.steamclean.plist [Click for support]
User Login Items: ℹ️
    uHD-Agent    Application  (/Applications/BlueStacks.app/Contents/Runtime/uHD-Agent.app)
    iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Dropbox    Application  (/Applications/Dropbox.app)
    MotoCastUpdater    Application Hidden (/Applications/MotoCast.app/Contents/Resources/MotoCastUpdater.app)
    Android File Transfer Agent    Application  (/Users/[redacted]/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)
    USBOverdriveHelper    UNKNOWN  (missing value)
    Google Drive    Application  (/Applications/Google Drive.app)
    Google Chrome    Application Hidden (/Applications/Google Chrome.app)
    BitTorrent    UNKNOWN  (missing value)
    MotoCast    Application Hidden (/Applications/MotoCast.app)
Internet Plug-ins: ℹ️
    JavaAppletPlugin: Version: Java 8 Update 20 Check version
    o1dbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    Unity Web Player: Version: UnityPlayer version 4.6.1f1 - SDK 10.6 [Click for support]
    Default Browser: Version: 537 - SDK 10.9
    Flip4Mac WMV Plugin: Version: 2.4.4.2 [Click for support]
    AdobePDFViewerNPAPI: Version: 11.0.06 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Silverlight: Version: 5.1.10411.0 - 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
    JavaAppletPlugin1: Version: Java 8 Update 20 [Click for support]
    CitrixICAClientPlugIn: Version: 11.2.0 [Click for support]
    AdobePDFViewer: Version: 11.0.06 - SDK 10.6 [Click for support]
    googletalkbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    SharePointBrowserPlugin: Version: 14.3.6 - SDK 10.6 [Click for support]
    DirectorShockwave: Version: 12.0.3r133 - SDK 10.6 [Click for support]
User internet Plug-ins: ℹ️
    BlueStacks Install Detector: Version: 0.3.6 - SDK 10.7 [Click for support]
    Picasa: Version: 1.0 - SDK 10.6 [Click for support]
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
3rd Party Preference Panes: ℹ️
    Citrix Online Plug-in  [Click for support]
    Flash Player  [Click for support]
    Flip4Mac WMV  [Click for support]
    Java  [Click for support]
    MagicPrefs  [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
        19%    Google Chrome
         7%    WindowServer
         2%    hidd
         1%    NETGEARGenieDaemon
         0%    Google Drive
Top Processes by Memory: ℹ️
    180 MB    Google Chrome
    82 MB    Finder
    35 MB    Google Chrome Helper
    34 MB    ocspd
    34 MB    mds_stores
Virtual Memory Information: ℹ️
    28 MB    Free RAM
    906 MB    Active RAM
    890 MB    Inactive RAM
    1.17 GB    Wired RAM
    39.99 GB    Page-ins
    423 MB    Page-outs

Answer 1

When you see a beachball cursor or the slowness is especially bad, note the exact time: hour, minute, second.  
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.