Imac late 2013 running slow

I have run Etreck as advised in another post.

report below, any advice on how to speed up my iMac to how it was when I purchased it would be appreciated.

EtreCheck version: 3.4.6 (460)

Report generated 2018-01-29 15:01:10

Download EtreCheck from https://etrecheck.com

Runtime: 12:47

Performance: Poor

Click the [Lookup] links for more information from Apple Support Communities.

Click the [Details] links for more information about that line.

Problem: Computer is too slow

Hardware Information: ⓘ

iMac (27-inch, Late 2013)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac14,2

1 3.5 GHz Intel Core i7 (i7-4771) CPU: 4-core

16 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

8 GB DDR3 1600 MHz ok

BANK 1/DIMM0

8 GB DDR3 1600 MHz ok

BANK 0/DIMM1

Empty

BANK 1/DIMM1

Empty

Handoff/Airdrop2: supported

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

iCloud Quota: 4.37 GB available

Video Information: ⓘ

NVIDIA GeForce GTX 775M - VRAM: 2048 MB

iMac 2560 x 1440

Disk Information: ⓘ

APPLE HDD WD10EZES-40UFAA0 disk0: (1 TB) (Rotational)

[Show SMART report]

EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB

KYM IMAC (disk0s2 - Journaled HFS+) / [Startup]: 999.35 GB (515.60 GB free)

Recovery HD (disk0s3 - Journaled HFS+) <not mounted> [Recovery]: 650 MB

USB Information: ⓘ

USB30Bus

TOSHIBA External USB 3.0

External USB 3.0 disk1: (1 TB)

EFI (disk1s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB

TOSHIBA (disk1s2 - Journaled HFS+) /Volumes/TOSHIBA : 999.86 GB (915.42 GB free)

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime HD Camera (Built-in)

Apple, Inc. Keyboard Hub

Apple Inc. Apple Keyboard

USB 2.0 Hub

Western Digital Ext HDD 1021

Ext HDD 1021 disk2: (2 TB)

EFI (disk2s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB

WD 2 (disk2s2 - Journaled HFS+) /Volumes/WD 2 : 2.00 TB (426.86 GB free)

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

System Software: ⓘ

macOS Sierra 10.12.6 (16G1212) - Time since boot: about 5 hours

Gatekeeper: ⓘ

Mac App Store and identified developers

Kernel Extensions: ⓘ

/Library/Application Support/Roxio

[not loaded] com.roxio.TDIXController (2.0) [Lookup]

/System/Library/Extensions

[not loaded] com.roxio.BluRaySupport (1.1.6) [Lookup]

System Launch Agents: ⓘ

[not loaded] 6 Apple tasks

[loaded] 175 Apple tasks

[running] 104 Apple tasks

System Launch Daemons: ⓘ

[not loaded] 38 Apple tasks

[loaded] 176 Apple tasks

[running] 105 Apple tasks

Launch Agents: ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2017-11-27) [Lookup]

[not loaded] com.adobe.GC.Invoker-1.0.plist (Adobe Systems, Inc. - installed 2018-01-23) [Lookup]

[running] com.brother.LOGINserver.plist (? a1772de2 41ad4933 - installed 2015-10-12) [Lookup]

[running] com.epson.eventmanager.agent.plist (EPSON - installed 2016-12-26) [Lookup]

[running] com.epson.scannermonitor.plist (? d676d40 b7c58655 - installed 2016-12-26) [Lookup]

[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2017-09-28) [Lookup]

[loaded] com.oracle.java.Java-Updater.plist (? 93a85952 834cfa51 - installed 2016-07-28) [Lookup]

[not loaded] com.teamviewer.teamviewer.plist (TeamViewer GmbH - installed 2017-01-13) [Lookup]

[not loaded] com.teamviewer.teamviewer_desktop.plist (TeamViewer GmbH - installed 2016-12-21) [Lookup]

Launch Daemons: ⓘ

[running] com.adobe.agsservice.plist (Adobe Systems, Inc. - installed 2018-01-23) [Lookup]

[loaded] com.adobe.fpsaud.plist (Adobe Systems, Inc. - installed 2017-12-15) [Lookup]

[running] com.fitbit.galileod.plist (Fitbit, Inc. - installed 2015-10-31) [Lookup]

[loaded] com.google.keystone.daemon.plist (Google, Inc. - installed 2017-10-16) [Lookup]

[loaded] com.microsoft.office.licensing.helper.plist (? 6d8cb30e afb3bef0 - installed 2010-08-25) [Lookup]

[loaded] com.microsoft.office.licensingV2.helper.plist (Microsoft Corporation - installed 2015-08-15) [Lookup]

[loaded] com.oracle.java.Helper-Tool.plist (Shell Script e3fefdd2 - installed 2016-06-22) [Lookup]

[loaded] com.teamviewer.Helper.plist (TeamViewer GmbH - installed 2016-12-21) [Lookup]

[not loaded] com.teamviewer.teamviewer_service.plist (TeamViewer GmbH - installed 2017-01-13) [Lookup]

User Launch Agents: ⓘ

[loaded] com.adobe.ARM.[...].plist (? 881a4a1c b30b9bfc - installed 2017-11-27) [Lookup]

[loaded] com.adobe.GC.Invoker-1.0.plist (Adobe Systems, Inc. - installed 2018-01-24) [Lookup]

[loaded] com.citrixonline.GoToMeeting.G2MUpdate.plist (Citrix Online LLC - installed 2017-12-06) [Lookup]

[loaded] com.logmein.GoToMeeting.G2MUpdate.plist (Citrix Online LLC - installed 2017-12-06) [Lookup]

[running] com.microsoft.LaunchAgent.SyncServicesAgent.plist (? 5fe0fad6 dc28ea6b - installed 2014-04-05) [Lookup]

[failed] com.wondershare.AnjoyTunesHelper.plist (Wondershare Software Co., Ltd - installed 2016-06-06) [Lookup]

Internet Plug-ins: ⓘ

AdobeAAMDetect: AdobeAAMDetect 1.0.0.0 (installed 2017-11-27) [Lookup]

FlashPlayer-10.6: 28.0.0.137 (installed 2018-01-10) [Lookup]

QuickTime Plugin: 7.7.3 (installed 2018-01-25)

AdobePDFViewerNPAPI: 11.0.09 (installed 2014-12-05) [Lookup]

AdobePDFViewer: 11.0.09 (installed 2014-12-05) [Lookup]

Flash Player: 28.0.0.137 (installed 2018-01-10) [Lookup]

JavaAppletPlugin: Java 8 Update 101 build 13 (installed 2016-07-28) Check version

SharePointBrowserPlugin: 14.0.0 (installed 2010-08-26) [Lookup]

Silverlight: 5.1.50428.0 (installed 2016-08-02) [Lookup]

iPhotoPhotocast: 7.0 (installed 2014-11-24)

User internet Plug-ins: ⓘ

WebEx64: 1.0 (installed 2017-01-30) [Lookup]

ZoomUsPlugIn: 4.1.11049.1024 (installed 2017-11-14) [Lookup]

Safari Extensions: ⓘ

[enabled] IncognIt VPN Switcher - IncogniTeam Ltd. - http://www.incogniteam.com (installed 2015-12-21)

3rd Party Preference Panes: ⓘ

Flash Player (installed 2017-12-15) [Lookup]

Java (installed 2016-07-28) [Lookup]

Time Machine: ⓘ

Auto backup: YES

Volumes being backed up:

KYM IMAC: Disk size: 999.35 GB Disk used: 483.75 GB

Destinations:

Time machine 1 [Local]

Total size: 1.00 TB

Total number of backups: 65

Oldest backup: 2/7/14, 1:25 pm

Last backup: 20/7/15, 3:26 pm

Size of backup disk: Too small

Backup size 1.00 TB < (Disk used 483.75 GB X 3)

Top Processes by CPU: ⓘ

11% kernel_task

10% WindowServer

6% LocationMenu

6% airportd

5% coreaudiod

Top Processes by Memory: ⓘ

1.73 GB com.apple.WebKit.WebContent

1.06 GB kernel_task

481 MB com.apple.WebKit.WebContent

329 MB Safari

322 MB com.apple.WebKit.WebContent

Top Processes by Network Use: ⓘ

Input Output Process name

2 MB 443 KB mDNSResponder

191 KB 203 KB com.apple.WebKit.Networking

76 KB 76 KB apsd

95 KB 11 KB netbiosd

55 KB 23 KB iTunes

Top Processes by Energy Use: ⓘ

9.16 WindowServer

5.26 coreaudiod

4.52 Epson Scanner Monitor

1.66 iTunes

Virtual Memory Information: ⓘ

8.80 GB Available RAM

1.15 GB Free RAM

7.20 GB Used RAM

7.65 GB Cached files

0 B Swap Used

Software installs (last 30 days): ⓘ

iFax: 3.16 (installed 2018-01-03)

Adobe Flash Player: (installed 2018-01-10)

iFax: 3.17 (installed 2018-01-24)

Install information may not be complete.

Diagnostics Events (last 3 days for minor events): ⓘ

2018-01-29 12:33:38 Microsoft AutoUpdate.app Crash [Open]

2018-01-28 14:12:44 Emicsoft Video Converter for Mac.app High CPU use [Open] [Details]