Slowwww system since upgrade - EtreCheck report shows

Question

I have been having issues since I upgraded to OS X Yosemite 10.10.1
Everything is sooooooo slow - apps stop responding and I have to force quit frequently - Preview doesn't even open at all and I'm having to restart several times throughout the day.  I ran EtreCheck below but really don't know what anything means or what I need to do??  Help please?
Problem description:
system extremely slow
apps either take forever to open, or stop responding and I have to force quit
preview not working at all
EtreCheck version: 2.1.6 (109)
Report generated January 23, 2015 at 1:54:39 PM EST
Download EtreCheck from http://etresoft.com/etrecheck
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Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
    iMac (21.5-inch, Mid 2011) (Technical Specifications)
    iMac - model: iMac12,1
    1 2.5 GHz Intel Core i5 CPU: 4-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            empty empty empty empty
        BANK 1/DIMM1
            empty empty empty empty
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless:  en1: 802.11 a/b/g/n
Video Information: ℹ️
    AMD Radeon HD 6750M - VRAM: 512 MB
        iMac 1920 x 1080
System Software: ℹ️
    OS X 10.10.1 (14B25) - Time since boot: 22:44:8
Disk Information: ℹ️
    WDC WD5000AAKS-402AA0 disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 499.25 GB (43.67 GB free)
        Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
    OPTIARC DVD RW AD-5690H disk2 : (183.6 MB)
        disk2s1 (disk2s1) <not mounted> : 160 MB
        disk2s1s1 (disk2s1s1) <not mounted> : 18 KB
        EPSON (disk2s1s2) /Volumes/EPSON : 604 KB (0 B free)
    HGST HTS721010A9E630 disk1 : (1 TB)
        EFI (disk1s1) <not mounted> : 210 MB
        G-DRIVE mobile with Thunderbolt (disk1s2) /Volumes/G-DRIVE mobile with Thunderbolt : 999.86 GB (373.52 GB free)
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple, Inc. Keyboard Hub
        Apple Inc. Apple Keyboard
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Internal Memory Card Reader
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
        G-Technology G-DRIVE mobile with Thunderbolt
Gatekeeper: ℹ️
    Mac App Store and identified developers
Problem System Launch Daemons: ℹ️
    [killed]    com.apple.ctkd.plist
    [killed]    com.apple.icloud.findmydeviced.plist
    [killed]    com.apple.ifdreader.plist
    [killed]    com.apple.nehelper.plist
    [killed]    com.apple.wdhelper.plist
    5 processes killed due to memory pressure
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Support]
    [loaded]    com.adobe.AdobeCreativeCloud.plist [Support]
    [loaded]    com.adobe.CS4ServiceManager.plist [Support]
    [running]    com.epson.ecrp.launcher.plist [Support]
    [running]    com.epson.Epson_Low_Ink_Reminder.launcher.plist [Support]
    [loaded]    com.epson.esua.launcher.plist [Support]
    [running]    com.epson.eventmanager.agent.plist [Support]
    [loaded]    com.google.keystone.agent.plist [Support]
    [loaded]    com.oracle.java.Java-Updater.plist [Support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Support]
    [loaded]    com.adobe.versioncueCS4.plist [Support]
    [loaded]    com.google.keystone.daemon.plist [Support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Support]
    [loaded]    com.oracle.java.JavaUpdateHelper.plist [Support]
    [loaded]    com.sharpcast.xfsmond.plist [Support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Support]
    [loaded]    com.adobe.ARM.[...].plist [Support]
    [loaded]    com.leadertech.PowerRegister.EPS2.0949866b1ec026eb1f319784d47bf291.plist [Support]
User Login Items: ℹ️
    iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    AdobeResourceSynchronizer    Application  (/Applications/Adobe Acrobat 9 Pro/Adobe Acrobat Pro.app/Contents/Support/AdobeResourceSynchronizer.app)
    Dropbox    Application  (/Applications/Dropbox.app)
    Mail    Application  (/Applications/Mail.app)
    EpsonLowInkReminderAgent    Application  (/Applications/Epson Software/Epson Low Ink Reminder.app/Contents/EpsonLowInkReminderAgent.app)
Internet Plug-ins: ℹ️
    o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
    AmazonMP3DownloaderPlugin1017277: Version: AmazonMP3DownloaderPlugin 1.0.17 [Support]
    Default Browser: Version: 600 - SDK 10.10
    Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 [Support]
    AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 [Support]
    FlashPlayer-10.6: Version: 16.0.0.287 - SDK 10.6 [Support]
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Support]
    Silverlight: Version: 5.1.10411.0 - SDK 10.6 [Support]
    Flash Player: Version: 16.0.0.287 - SDK 10.6 [Support]
    QuickTime Plugin: Version: 7.7.3
    googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 [Support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Support]
    JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
    CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Support]
    WebEx64: Version: 1.0 - SDK 10.6 [Support]
3rd Party Preference Panes: ℹ️
    Adobe Version Cue CS4  [Support]
    Flash Player  [Support]
    Flip4Mac WMV  [Support]
    Java  [Support]
Time Machine: ℹ️
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 499.25 GB Disk used: 455.58 GB
    Destinations:
        G-DRIVE mobile with Thunderbolt [Local]
        Total size: 999.86 GB
        Total number of backups: 40
        Oldest backup: 2014-11-26 22:02:51 +0000
        Last backup: 2015-01-23 18:21:35 +0000
        Size of backup disk: Too small
            Backup size 999.86 GB < (Disk used 455.58 GB X 3)
Top Processes by CPU: ℹ️
         5%    Finder
         4%    WindowServer
         3%    Mail
         2%    QuickLookSatellite
         0%    hidd
Top Processes by Memory: ℹ️
    395 MB    firefox
    223 MB    Mail
    168 MB    Finder
    152 MB    Adobe Photoshop CC 2014
    112 MB    mds_stores
Virtual Memory Information: ℹ️
    34 MB    Free RAM
    1.04 GB    Active RAM
    1.01 GB    Inactive RAM
    887 MB    Wired RAM
    19.20 GB    Page-ins
    1.18 GB    Page-outs
Diagnostics Information: ℹ️
    Jan 23, 2015, 10:25:49 AM    /Library/Logs/DiagnosticReports/Preview_2015-01-23-102549_[redacted].hang
    Jan 23, 2015, 10:25:03 AM    /Library/Logs/DiagnosticReports/loginwindow_2015-01-23-102503_[redacted].crash
    Jan 23, 2015, 10:25:01 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-01-23-10 2501_[redacted].crash
    Jan 22, 2015, 06:32:50 PM    /Library/Logs/DiagnosticReports/iTunes_2015-01-22-183250_[redacted].cpu_resourc e.diag [Details]
    Jan 22, 2015, 03:13:29 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/AdobeResourceSynchronizer_2015 -01-22-151329_[redacted].crash
    Jan 22, 2015, 03:11:12 PM    Self test - passed
    Jan 22, 2015, 01:57:30 PM    /Library/Logs/DiagnosticReports/Adobe Photoshop CC 2014_2015-01-22-135730_[redacted].cpu_resource.diag [Details]
    Jan 22, 2015, 01:47:38 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-01-22-134738_[reda cted].crash
    Jan 22, 2015, 12:47:18 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/AdobeResourceSynchronizer_2015 -01-22-124718_[redacted].crash
    Jan 22, 2015, 12:36:41 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-01-22-12 3641_[redacted].crash
    Jan 21, 2015, 06:06:28 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/ExManBridgeTalkCmd_2015-01-21- 180628_[redacted].crash
    Jan 21, 2015, 01:42:17 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-01-21-134217_[reda cted].crash

Answer 1

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.
Click the Clear Display icon in the toolbar. Then try to launch Preview. Select any messages that appear in the Console window. Copy them 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 which is irrelevant to 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 or email address, may appear in the log. Anonymize before posting.