System running very slow

Question

Hi guys hoping someone can help, my system seems to be running very slow once the iMac has been on for a while, programs take a long time to open and there seems to be a general lag on the whole system.
I have a lot of photos and movies on the drive so wasn't sure if this was not helping, also only have the standard 4GB ram and wondered if this could be the issue?
I also try not to have too much third party software on the iMac.
I have used EtreCheck so hopefully the issue may standout to someone a bit more computer minded that myself, thanks in advance Nucci.
EtreCheck version: 1.9.12 (48)
Report generated 23 June 2014 1:18:32 pm ACST
Hardware Information:
  iMac (27-inch, Mid 2011) (Verified)
  iMac - model: iMac12,2
  1 3.1 GHz Intel Core i5 CPU: 4 cores
  4 GB RAM
Video Information:
  AMD Radeon HD 6970M - VRAM: 1024 MB
  iMac 2560 x 1440
System Software:
  OS X 10.9.3 (13D65) - Uptime: 6 days 18:14:2
Disk Information:
  WDC WD1001FALS-403AA0 disk0 : (1 TB)
  EFI (disk0s1) <not mounted>: 209.7 MB
  Macintosh HD (disk0s2) / [Startup]: 999.35 GB (236.47 GB free)
  Recovery HD (disk0s3) <not mounted>: 650 MB
  HL-DT-STDVDRW  GA32N 
USB Information:
  EPSON USB2.0 MFP(Hi-Speed)
  Apple Computer, Inc. IR Receiver
  Apple Internal Memory Card Reader
  Western Digital My Passport 0748 1 TB
  EFI (disk1s1) <not mounted>: 209.7 MB
  disk1s2 (disk1s2) <not mounted>: 999.83 GB
  Boot OS X (disk1s3) <not mounted>: 134.2 MB
  Apple Inc. BRCM2046 Hub
  Apple Inc. Bluetooth USB Host Controller
  Apple Inc. FaceTime HD Camera (Built-in)
Thunderbolt Information:
  Apple Inc. thunderbolt_bus
Gatekeeper:
  Mac App Store and identified developers
Kernel Extensions:
  [loaded] com.bresink.driver.BRESINKx86Monitoring (9.0) Support
  [loaded] com.silex.driver.sxuptp (1.5.1) Support
  [not loaded] com.tomtom.driver.UsbEthernetGadget (1.0.0d1) Support
Problem System Launch Daemons:
  [failed] com.apple.AOSNotificationOSX.plist
  [failed] com.apple.wdhelper.plist
Launch Daemons:
  [loaded] com.adobe.fpsaud.plist Support
  [loaded] com.google.keystone.daemon.plist Support
  [loaded] com.oracle.java.Helper-Tool.plist Support
  [loaded] com.oracle.java.JavaUpdateHelper.plist Support
Launch Agents:
  [running] com.Affinegy.InstaLANa.plist Support
  [running] com.epson.epw.agent.plist Support
  [loaded] com.google.keystone.agent.plist Support
  [loaded] com.oracle.java.Java-Updater.plist Support
User Launch Agents:
  [loaded] com.adobe.ARM.[...].plist Support
  [loaded] com.facebook.videochat.[redacted].plist Support
User Login Items:
  MyDriveConnect
  MyTomTomSA
  iTunesHelper
  AdobeResourceSynchronizer
  AppTrap
  Belkin Router Monitor
  iTunes
Internet Plug-ins:
  JavaAppletPlugin: Version: Java 7 Update 55 Check version
  FlashPlayer-10.6: Version: 14.0.0.125 - SDK 10.6 Support
  Default Browser: Version: 537 - SDK 10.9
  AdobePDFViewerNPAPI: Version: 10.1.10 Support
  AdobePDFViewer: Version: 10.1.10 Support
  Flash Player: Version: 14.0.0.125 - SDK 10.6 Support
  o1dbrowserplugin: Version: 5.4.2.18903 Support
  QuickTime Plugin: Version: 7.7.3
  googletalkbrowserplugin: Version: 5.4.2.18903 Support
  Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
  iPhotoPhotocast: Version: 7.0
Safari Extensions:
  Ebay Shopping Assistant: Version: 1.1
  Slick Savings: Version: 2.0
  Amazon Shopping Assistant: Version: 1.1
  Searchme: Version: 1.3
Audio Plug-ins:
  BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
  AirPlay: Version: 2.0 - SDK 10.9
  AppleAVBAudio: Version: 203.2 - SDK 10.9
  iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
  Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
  Google Earth Web Plug-in: Version: 7.1 Support
3rd Party Preference Panes:
  Flash Player  Support
  Java  Support
Time Machine:
  Skip System Files: NO
  Mobile backups: OFF
  Auto backup: YES
  Volumes being backed up:
  Macintosh HD: Disk size: 930.71 GB Disk used: 710.48 GB
  Destinations:
  Time Machine [Local] (Last used)
  Total size: 930.86 GB
  Total number of backups: 36
  Oldest backup: 2014-04-17 23:39:26 +0000
  Last backup: 2014-06-22 09:37:24 +0000
  Size of backup disk: Too small
  Backup size 930.86 GB < (Disk used 710.48 GB X 3)
  Time Machine details may not be accurate.
  All volumes being backed up may not be listed.
Top Processes by CPU:
      1% JavaApplicationStub
      1% PluginProcess
      0% WindowServer
      0% Safari
      0% printtool
Top Processes by Memory:
  340 MB iTunes
  254 MB com.apple.MediaLibraryService
  229 MB Safari
  184 MB JavaApplicationStub
  57 MB Mail
Virtual Memory Information:
  23 MB Free RAM
  991 MB Active RAM
  995 MB Inactive RAM
  847 MB Wired RAM
  3.81 GB Page-ins
  151 MB Page-outs

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. Click Utilities, then Console in the icon grid.
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 the action that you're having trouble with again. 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, may appear in the log. Anonymize before posting.