Thanks for your input. I tried Booting into the Recovery volume and used Disk Utility but nothing changed upon restart. I have just run it again and have added the results at the foot of this reply.
I already had EtreCheck, and here's what it came back with:
EtreCheck version: 2.2 (132)
Report generated 5/27/15, 1:10 AM
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.
Click the [Click to remove] links for help removing adware.
Hardware Information: ℹ️
iMac (24-inch, Early 2009) (Verified)
iMac - model: iMac9,1
1 2.66 GHz Intel Core 2 Duo CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1067 MHz ok
BANK 1/DIMM0
2 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
NVIDIA GeForce 9400 - VRAM: 256 MB
iMac 1920 x 1200
System Software: ℹ️
OS X 10.10.3 (14D136) - Time since boot: 0:7:14
Disk Information: ℹ️
WDC WD6400AAKS-40H2B0 disk0 : (640.14 GB)
EFI (disk0s1) <not mounted> : 210 MB
Jupiter (disk0s2) / : 639.28 GB (187.67 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
OPTIARC DVD RW AD-5670S
USB Information: ℹ️
Apple Inc. Built-in iSight
Apple, Inc. Keyboard Hub
Apple, Inc Apple Keyboard
Apple Computer, Inc. IR Receiver
Kensington Kensington Expert Mouse
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Configuration files: ℹ️
/etc/hosts - Count: 1
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Applications/Toast 7 Titanium/Toast Titanium.app
[not loaded] com.roxio.TDIXController (1.4) [Click for support]
/Applications/Transmit.app
[not loaded] com.panic.TransmitDisk.transmitdiskfs (4.0.0 - SDK 10.6) [Click for support]
/Library/Extensions
[not loaded] com.caiaq.driver.NIUSBGuitarRigMobileDriver (2.6.0 - SDK 10.8) [Click for support]
[not loaded] com.caiaq.driver.NIUSBHardwareDriver (2.6.0 - SDK 10.8) [Click for support]
[loaded] jp.plentycom.driver.SteerMouse (4.1.8 - SDK 10.6) [Click for support]
/System/Library/Extensions
[not loaded] com.IKMultimedia.driver.StompIO1 (1.0.0) [Click for support]
[not loaded] com.focusrite.driver.usb.audio (2.2) [Click for support]
[not loaded] com.ikmultimedia.driver.StealthPedal (1.0.0) [Click for support]
[not loaded] com.kensington.mouseworks.iokit.KensingtonMouseDriver (3.0) [Click for support]
[not loaded] com.kensington.trackballworks.driver (1.1.1 - SDK 10.6) [Click for support]
[not loaded] com.realtek.driver.RTL8187B (1150) [Click for support]
[loaded] tc.tctechnologies.driver.Saffire (4.1.4 18735 - SDK 10.6) [Click for support]
/System/Library/Extensions/KensingtonMouseDriver.kext/Contents/PlugIns
[not loaded] com.kensington.mouseworks.driver.ADBID32Mouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.ADBID32MouseX1 (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.ADBID4Mouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.ADBID4MouseX1 (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.KMWBluetoothHIDMouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.KMWBluetoothOldHIDMouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.KMWUSBHIDMouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.USBMouseX1 (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.VirtualMouse (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.driver.VirtualMouseX1 (3.0) [Click for support]
[not loaded] com.kensington.mouseworks.iokit.KensingtonMouseDriverX1 (3.0) [Click for support]
Launch Agents: ℹ️
[not loaded] com.adobe.CS4ServiceManager.plist [Click for support]
[not loaded] com.netgear.wutility [Click for support]
[loaded] com.oracle.java.Java-Updater.plist [Click for support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Click for support]
[not loaded] com.adobe.versioncueCS3.plist [Click for support]
[not loaded] com.bombich.ccc.plist [Click for support]
[not loaded] com.caphyon.awrserver.plist [Click for support]
[not loaded] com.marketcircle.daylite.dlconfigd.plist [Click for support]
[loaded] com.oracle.java.Helper-Tool.plist [Click for support]
[running] com.paceap.eden.licensed.plist [Click for support]
[loaded] tc.tctechnologies.Saffire.plist [Click for support]
User Launch Agents: ℹ️
[not loaded] com.marketcircle.daylite.dlbackuppersonal.plist [Click for support]
[not loaded] com.marketcircle.daylite.pidclear.plist [Click for support]
[running] com.spigot.SearchProtection.plist [Click for support]
[not loaded] com.valvesoftware.steamclean.plist [Click for support]
User Login Items: ℹ️
TrackballWorksHelper Application Hidden (/Library/PreferencePanes/TrackballWorks.prefPane/Contents/Resources/TrackballW orksHelper.app)
NIHardwareAgent Application Hidden (/Library/Application Support/Native Instruments/Hardware/NIHardwareAgent.app)
Internet Plug-ins: ℹ️
NPDjVu: Version: Unknown [Click for support]
JavaPlugin2_NPAPI: Version: 15.0.0 - SDK 10.7
Default Browser: Version: 600 - SDK 10.10
Flip4Mac WMV Plugin: Version: 2.2.1.11 [Click for support]
npBTEmailConfig: Version: 1.0 [Click for support]
PrintDialogExt: Version: 3.5 [Click for support]
OfficeLiveBrowserPlugin: Version: 12.2.0 [Click for support]
FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]
Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
Flash Player: Version: 17.0.0.169 - SDK 10.6 Outdated! Update
iPhotoPhotocast: Version: 7.0 - SDK 10.7
QuickTime Plugin: Version: 7.7.3
AdobePDFViewer: Version: 8.1.0 [Click for support]
JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
fbplugin_1_0_3: Version: Unknown [Click for support]
Safari Extensions: ℹ️ (These are all OFF)
JavaScript Blocker
Reload Button
Validator
wide-vimeo-safari
Twitter for Safari
Slick Savings Adware! [Click to remove]
Evernote Web Clipper
A Cleaner YouTube
Alexa Site Stats
Amazon Shopping Assistant Adware! [Click to remove]
AdBlock
Franker
Searchme Adware! [Click to remove]
Ebay Shopping Assistant Adware! [Click to remove]
Translate
Turn Off the Lights
VimeoEmbiggener
YoutubeWide
BuiltWith
3rd Party Preference Panes: ℹ️
3ivx MPEG-4 [Click for support]
Adobe Version Cue CS3 [Click for support]
Flash Player [Click for support]
Flip4Mac WMV [Click for support]
iStat menus [Click for support]
Java [Click for support]
TrackballWorks [Click for support]
Kensington MouseWorks [Click for support]
Native Instruments USB Audio [Click for support]
SteerMouse [Click for support]
StuffIt AVR [Click for support]
Time Machine: ℹ️ (I don't use this)
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Destinations:
Time [Local]
Total size: 0 B
Total number of backups: 0
Oldest backup: -
Last backup: -
Size of backup disk: Excellent
Backup size 0 B > (Disk size 0 B X 3)
Top Processes by CPU: ℹ️
54% mdworker(4)
4% WindowServer
0% taskgated
0% SystemUIServer
0% askpermissiond
Top Processes by Memory: ℹ️
518 MB kernel_task
115 MB mdworker(4)
74 MB Dock
74 MB Finder
57 MB mds_stores
Virtual Memory Information: ℹ️
1.28 GB Free RAM
2.72 GB Used RAM
0 B Swap Used
Diagnostics Information: ℹ️
May 27, 2015, 12:58:25 AM Self test - passed
May 26, 2015, 10:03:57 PM /Library/Logs/DiagnosticReports/Mail_2015-05-26-220357_[redacted].hang
May 26, 2015, 01:55:14 PM /Library/Logs/DiagnosticReports/com.apple.WebKit.Plugin.64_2015-05-26-135514_[r edacted].hang
May 26, 2015, 11:56:28 AM /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.preference.security. remoteservice_2015-05-26-115628_[redacted].crash
May 26, 2015, 12:14:37 AM /Users/[redacted]/Library/Logs/DiagnosticReports/PTPCamera_2015-05-26-001437_[r edacted].crash
And here are the Disk Utility results:
Warning: SUID file “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent” has been modified and will not be repaired.ACL found but not expected on “Library/Printers”ACL found but not expected on “Library/Printers/PPDs”ACL found but not expected on “Users”User differs on “private/var/db/displaypolicyd”; should be 0; user is 244.Group differs on “private/var/db/displaypolicyd”; should be 0; group is 244.
Permissions verification complete