Performance issues since upgrade

I am on a late 2011 MacBook Pro and am having severs performance issues since upgrading to Mavericks. I fear my issues may be related to company installed anti-virus (which I cannot remove), but I was hoping someone could look over my EtreCheck for other potential solutions.

One really odd issue I am having, which I cannot seem to find good information for on Google, is at least 4-5 times a day my Mac just stops. No beach ball, no anything, for about 1-5 minutes. Then it's fine. Maybe just me grasping at straws, but it seems related to a when webpage loads a bunch of images? I always use Safari btw, but testing other browsers, like Chrome & Firefox, it happens as well.

I have also removed TotalFinder and have noticed no improvement and still have the above issue.

Thanks in advance!

Here is my EtreCheck:

Problem description:

slow performance on Mavericks

EtreCheck version: 2.0.11 (98)

Report generated November 11, 2014 at 8:51:26 AM EST

Hardware Information: ℹ️

MacBook Pro (17-inch, Late 2011) (Verified)

MacBook Pro - model: MacBookPro8,3

1 2.5 GHz Intel Core i7 CPU: 4-core

8 GB RAM Upgradeable

BANK 0/DIMM0

4 GB DDR3 1333 MHz ok

BANK 1/DIMM0

4 GB DDR3 1333 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Video Information: ℹ️

Intel HD Graphics 3000 - VRAM: 512 MB

AMD Radeon HD 6770M - VRAM: 1024 MB

Color LCD 1920 x 1200

LED Cinema Display 1920 x 1200

System Software: ℹ️

OS X 10.9.5 (13F34) - Uptime: 0:46:22

Disk Information: ℹ️

APPLE HDD HTS727575A9E362 disk0 : (750.16 GB)

S.M.A.R.T. Status: Verified

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / [Startup]: 749.30 GB (256.69 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

MATSHITADVD-R UJ-8A8

USB Information: ℹ️

Apple Inc. FaceTime HD Camera (Built-in)

Fitbit Inc. Fitbit Base Station

Apple Inc. BRCM2070 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. Apple Internal Keyboard / Trackpad

Apple, Inc. Keyboard Hub

Apple, Inc Apple Keyboard

Tablet PTZ-630

Logitech Logitech USB Headset

Apple Inc. Display iSight

Apple Inc. Apple LED Cinema Display

Apple Inc. Display Audio

Apple Computer, Inc. IR Receiver

Firewire Information: ℹ️

Iomega HDD unknown_device 800mbit - 800mbit max

S.M.A.R.T. Status: Verified

disk1s1 (disk1s1) <not mounted> : 32 KB

Iomega HDD (disk1s3) /Volumes/Iomega HDD : 500.04 GB (22.88 GB free)

Files (disk1s5) /Volumes/Files : 499.90 GB (416.87 GB free)

Thunderbolt Information: ℹ️

Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️

Anywhere

Kernel Extensions: ℹ️

/Library/Application Support/Symantec/Protector

[not loaded] com.symantec.kext.protector.panther (1.0f5) Support

[not loaded] com.symantec.kext.protector.tigerplus (1.0f5) Support

/Library/StartupItems/SymAutoProtect

[loaded] com.Symantec.kext.SAVAPComm (11.0.6) Support

/System/Library/Extensions

[loaded] com.Cycling74.driver.Soundflower (1.5.1) Support

[loaded] com.InnovationTechnology.driver.ComputerAudio (1.01 - SDK 10.7) Support

[not loaded] com.cisco.nke.ipsec (2.0.1) Support

[not loaded] com.wacom.kext.wacomtablet (6.3.7 - SDK 10.8) Support

Startup Items: ℹ️

CiscoVPN: Path: /System/Library/StartupItems/CiscoVPN

NortonMissedTasks: Path: /Library/StartupItems/NortonMissedTasks

SMC: Path: /Library/StartupItems/SMC

SymAutoProtect: Path: /Library/StartupItems/SymAutoProtect

SymProtector: Path: /Library/StartupItems/SymProtector

Startup items are obsolete and will not work in future versions of OS X

Launch Agents: ℹ️

[not loaded] com.adobe.AAM.Updater-1.0.plist Support

[loaded] com.adobe.CS5ServiceManager.plist Support

[loaded] com.google.keystone.agent.plist Support

[running] com.jamfsoftware.jamf.agent.plist Support

[loaded] com.oracle.java.Java-Updater.plist Support

[running] com.symantec.quickmenu.application.plist Support

[running] com.wacom.wacomtablet.plist Support

[running] net.juniper.pulsetray.plist Support

Launch Daemons: ℹ️

[loaded] com.adobe.fpsaud.plist Support

[running] com.fitbit.fitbitd.plist Support

[running] com.fitbit.galileod.plist Support

[loaded] com.google.keystone.daemon.plist Support

[running] com.jamfsoftware.jamf.daemon.plist Support

[not loaded] com.jamfsoftware.startupItem.plist Support

[loaded] com.jamfsoftware.task.1.plist Support

[loaded] com.microsoft.office.licensing.helper.plist Support

[loaded] com.oracle.java.Helper-Tool.plist Support

[loaded] com.oracle.java.JavaUpdateHelper.plist Support

[loaded] com.rogueamoeba.instanton-agent.plist Support

[running] net.juniper.AccessService.plist Support

[loaded] net.juniper.UninstallPulse.plist Support

User Launch Agents: ℹ️

[loaded] com.valvesoftware.steamclean.plist Support

[running] ws.agile.1PasswordAgent.plist Support

User Login Items: ℹ️

gfxCardStatus Application (/Users/[redacted]/Downloads/gfxCardStatus.app)

Dropbox Application (/Applications/Dropbox.app)

Microsoft Database Daemon Application (/Applications/Microsoft Office 2011/Office/Microsoft Database Daemon.app)

cdn Volume (/Volumes/cdn)

TotalFinder Application (/Applications/TotalFinder.app)

SAVDiskMountNotify Application (/Library/Application Support/Symantec/AntiVirus/SAVDiskMountNotify.app)

ScanNotification Application (/Library/Application Support/Symantec/AntiVirus/ScanNotification.app)

SymSecondaryLaunch Application (/Library/Application Support/Norton Solutions Support/Scheduler/SymSecondaryLaunch.app)

Internet Plug-ins: ℹ️

OfficeLiveBrowserPlugin: Version: 12.3.6 Support

Flash Player: Version: 15.0.0.189 - SDK 10.6 Mismatch! Adobe recommends 15.0.0.223

AdobePDFViewer: Version: 10.0.2 Support

Unity Web Player: Version: UnityPlayer version 4.5.4f1 - SDK 10.6 Support

googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support

AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 Support

iPhotoPhotocast: Version: 7.0

DirectorShockwave: Version: 11.5.9r620 Support

QuickTime Plugin: Version: 7.7.3

FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support

Silverlight: Version: 4.0.60310.0 Support

MeetingJoinPlugin: Version: (null) - SDK 10.6 Support

net.juniper.DSSafariExtensions: Version: (null) Support

Default Browser: Version: 537 - SDK 10.9

Flip4Mac WMV Plugin: Version: 2.3.1.2 Support

o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support

WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.2 Support

SharePointBrowserPlugin: Version: 14.4.5 - SDK 10.6 Support

JavaAppletPlugin: Version: Java 7 Update 71 Check version

WacomNetscape: Version: 2.1.0-1 - SDK 10.8 Support

User Internet Plug-ins: ℹ️

SOEWebInstaller: Version: 1.0 - SDK 10.5 Support

Aspera Web 3.1.2.72265: Version: (null) - SDK 10.6 Support

Safari Extensions: ℹ️

1Password

Adblock Plus

Reddit Enhancement Suite

3rd Party Preference Panes: ℹ️

Flash Player Support

Flip4Mac WMV Support

Java Support

MacFUSE Support

SymAutoProtect

Symantec\nQuickMenu Support

WacomTablet Support

Time Machine: ℹ️

Skip System Files: NO

Mobile backups: ON

Auto backup: YES

Destinations:

Iomega HDD [Local]

Total size: 500.04 GB

Total number of backups: 37

Oldest backup: 2014-10-14 14:11:11 +0000

Last backup: 2014-11-11 13:27:48 +0000

Size of backup disk: Excellent

Backup size 500.04 GB > (Disk size 0 B X 3)

Top Processes by CPU: ℹ️

36% com.apple.WebKit.Plugin.64

34% SymAutoProtect

13% WindowServer

9% Unity

4% Activity Monitor

Top Processes by Memory: ℹ️

455 MB Safari

361 MB com.apple.WebKit.Plugin.64

292 MB Unity

77 MB com.apple.WebKit.Networking

77 MB com.apple.WebKit.WebContent

Virtual Memory Information: ℹ️

2.08 GB Free RAM

2.39 GB Active RAM

1.34 GB Inactive RAM

1.40 GB Wired RAM

1.11 GB Page-ins

5.54 GB Page-outs