iMac suddenly started running very slow

My iMac has started running very slow. i am not sure what the issue is but below is a report when i ran etrecheck.

EtreCheck version: 4.1.3 (4A188)

Report generated: 2018-03-22 10:43:11

Download EtreCheck from https://etrecheck.com

Runtime: 29:12

Performance: Poor

Problem: Computer is too slow

Description:

iMac has started running very slow. Even restarting is also very slow.

Major Issues:

Anything that appears on this list needs immediate attention.

Poor performance - EtreCheck report took over 10 minutes to run. This is very unusual.

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Small backup drive - Time Machine backup drive is too small.

Unsigned files - There is unsigned software installed. They appear to be legitimate but should be reviewed.

Hardware Information:

iMac (Retina 4K, 21.5-inch, Late 2015)

iMac Model: iMac16,2

1 3.1 GHz Intel Core i5 (i5-5675R) CPU: 4-core

8 GB RAM Not upgradeable

BANK 0/DIMM0

4 GB DDR3 1867 ok

BANK 1/DIMM0

4 GB DDR3 1867 ok

Video Information:

Intel Iris Pro Graphics 6200 - VRAM: 1536 MB

iMac 4096 x 2304

Drives:

disk0 - APPLE HDD HTS541010A9E662 1.00 TB (Mechanical)

Internal SATA 3 Gigabit Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 [Core Storage Container] 999.35 GB

disk1 - Macintosh HD (Journaled HFS+) 998.99 GB

disk0s3 - Recovery HD (Journaled HFS+) [Recovery] 650 MB

Mounted Volumes:

disk1 - Macintosh HD 998.99 GB (235.48 GB free)

Journaled HFS+

Mount point: /

Network:

Interface en0: Ethernet

Interface en6: MobileBroadBand

Interface en7: iPad

Interface en1: Wi-Fi

802.11 a/b/g/n/ac

One IPv4 address

Interface en5: iPhone

Interface en4: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

iCloud Quota: 118.56 GB available

System Software:

macOS High Sierra 10.13.2 (17C88)

Time since boot: Less than an hour

System Load: 2.16 (1 min ago) 1.76 (5 min ago) 1.17 (15 min ago)

Security:

Unsigned Files:

Launchd: ~/Library/LaunchAgents/com.yourcompany.uninstall.plist

Executable: /Applications/Surfline Uninstall.app/Running

Kernel Extensions:

/System/Library/Extensions

[Not Loaded] JRDMassStorageDriver32.kext (1.0.1)

[Not Loaded] JRDMassStorageDriver64.kext (1.0.1)

[Not Loaded] JRDUSBModemData32.kext (1.0.1)

[Not Loaded] JRDUSBModemData64.kext (4.0.8)

[Not Loaded] JRDECMControlDriver32.kext (1.0)

[Not Loaded] JRDECMControlDriver64.kext (1.0)

[Not Loaded] JRDECMDataDriver32.kext (1.0)

[Not Loaded] JRDECMDataDriver64.kext (1.0)

[Not Loaded] JRDUSBCDC32.kext (1.0)

[Not Loaded] JRDUSBCDC64.kext (1.0)

System Launch Agents:

System Launch Daemons:

Launch Agents:

Launch Daemons:

User Launch Agents:

User Login Items:

AdobeResourceSynchronizer Application (Adobe Systems, Inc.

(/Applications/Adobe Acrobat DC/Adobe Acrobat.app/Contents/Helpers/AdobeResourceSynchronizer.app)

Dropbox Application

(/Applications/Dropbox.app)

iTunesHelper Application (installed 2017-12-09)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins:

AdobePDFViewerNPAPI: 17.012.20098 (installed 2017-12-04)

AdobePDFViewer: 18.009.20050 (installed 2017-12-04)

QuickTime Plugin: 7.7.3 (installed 2017-12-16)

AdobeAAMDetect: 3.0.0.0 (installed 2016-11-04)

Time Machine:

Skip System Files: No

Mobile backups: No

Auto backup: Yes

Volumes being backed up:

Macintosh HD: Disk size: 998.99 GB - Disk used: 763.51 GB

Destinations:

T*******d [Local] (Last used)

Total size: 999.86 GB

Total number of backups: 28

Oldest backup: 2017-10-21 15:50:06

Last backup: 2018-01-13 17:41:18

Top Processes by CPU:

Top Processes by Memory:

Top Processes by Network Use:

Top Processes by Energy Use:

Virtual Memory Information:

Diagnostics Information (past 7 days):

2018-03-22 10:14:15 Microsoft Word.app Hang (once)

2018-03-20 08:34:36 Microsoft Excel.app Hang (once)

End of report