Thank you so much for your recommendation!
Here is what came up after running the check.
EtreCheck version: 3.4.6 (460)
Report generated 2017-12-11 01:55:31
Download EtreCheck from https://etrecheck.com
Runtime: 10:56
Performance: Poor
Click the [Lookup] links for more information from Apple Support Communities.
Click the [Details] links for more information about that line.
Click the [Clean up] link to delete unused files.
Problem: Computer is too slow
Hardware Information:ⓘ
MacBook Pro (13-inch, Mid 2012)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro9,2
1 2.5 GHz Intel Core i5 (i5-3210M) CPU: 2-core
4 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Handoff/Airdrop2: supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 581
iCloud Quota: 25.34 GB available
Video Information:ⓘ
Intel HD Graphics 4000 - VRAM: 1536 MB
Color LCD 1280 x 800
Disk Information:ⓘ
APPLE HDD HTS545050A7E362 disk0: (500.11 GB) (Rotational)
[Show SMART report]
EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB
(disk0s2) <not mounted> [CoreStorage Container]: 499.25 GB
(disk0s3) <not mounted> [Recovery]: 650 MB
HL-DT-ST DVDRW GS41N ()
USB Information:ⓘ
USB20Bus
hub_device
Apple Inc. FaceTime HD Camera (Built-in)
USB20Bus
hub_device
hub_device
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
USB30Bus
Thunderbolt Information:ⓘ
Apple Inc. thunderbolt_bus
Virtual disks:ⓘ
Macintosh HD (disk1 - Journaled HFS+) / [Startup]: 498.88 GB (283.42 GB free)
Physical disk: disk0s2 499.25 GB Online
Time Machine Backups (disk2s2 - Case-sensitive Journaled HFS+) /Volumes/Time Machine Backups : 3.00 TB (496.16 GB free)
Physical disk: Disk Image 3.00 TB (496.16 GB free)
System Software:ⓘ
macOS High Sierra 10.13.1 (17B1003) - Time since boot: less than an hour
Gatekeeper:ⓘ
Mac App Store and identified developers
Clean up:ⓘ
com.adobe.ARM.[...].plist
/Applications/Adobe Reader.app/Contents/MacOS/Updater/Adobe Reader Updater Helper.app/Contents/MacOS/Adobe Reader Updater Helper semi-auto
Executable not found!
/Users/[redacted]/Library/LaunchAgents/org.virtualbox.vboxwebsrv.plist
/Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv
Executable not found!
2 orphan files found. [Clean up]
Kernel Extensions:ⓘ
/Applications/zoom.us.app
[not loaded] zoom.us.ZoomAudioDevice (1.1 - SDK 10.8) [Lookup]
/Library/Application Support/VirtualBox
[loaded] org.virtualbox.kext.VBoxDrv (5.1.12) [Lookup]
[loaded] org.virtualbox.kext.VBoxNetAdp (5.1.12) [Lookup]
[loaded] org.virtualbox.kext.VBoxNetFlt (5.1.12) [Lookup]
[loaded] org.virtualbox.kext.VBoxUSB (5.1.12) [Lookup]
/Users/[redacted]/Apowersoft/Mac Online Launcher/Mac Online Launcher.app
[loaded] com.Apowersoft.driver.AudioDevice (1.6.7 - SDK 10.11) [Lookup]
[not loaded] com.Cycling74.driver.Soundflower (1.0.0 - SDK 10.8) [Lookup]
System Launch Agents:ⓘ
[not loaded] 8 Apple tasks
[loaded] 175 Apple tasks
[running] 105 Apple tasks
System Launch Daemons:ⓘ
[not loaded] 37 Apple tasks
[loaded] 181 Apple tasks
[running] 111 Apple tasks
Launch Agents:ⓘ
[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (Adobe Systems, Inc. - installed 2017-01-13) [Lookup]
[loaded] com.oracle.java.Java-Updater.plist (? 7bf31b42 be93c7fb - installed 2016-12-24) [Lookup]
[loaded] org.macosforge.xquartz.startx.plist (Apple Inc. - XQuartz - installed 2016-10-26) [Lookup]
Launch Daemons:ⓘ
[loaded] com.adobe.ARMDC.Communicator.plist (Adobe Systems, Inc. - installed 2017-01-13) [Lookup]
[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (Adobe Systems, Inc. - installed 2017-01-13) [Lookup]
[loaded] com.adobe.fpsaud.plist (? 2afb3af7 defea098 - installed 2017-10-25) [Lookup]
[not loaded] com.apple.installer.cleanupinstaller.plist (? 1963bf56 0 - installed 2017-11-17)
[loaded] com.microsoft.autoupdate.helper.plist (Microsoft Corporation - installed 2017-11-21) [Lookup]
[loaded] com.microsoft.office.licensing.helper.plist (? 6d8cb30e afb3bef0 - installed 2010-08-25) [Lookup]
[loaded] com.oracle.java.Helper-Tool.plist (Shell Script e3fefdd2 - installed 2016-12-24) [Lookup]
[running] com.sec.faxdb.plist (? 4d857385 a3fbdec4 - installed 2013-10-15) [Lookup]
[not loaded] org.eyebeam.SelfControl.plist (Charlie Stigler - installed 2014-07-16) [Lookup]
[loaded] org.macosforge.xquartz.privileged_startx.plist (Apple Inc. - XQuartz - installed 2016-10-26) [Lookup]
[not loaded] org.virtualbox.startup.plist (Shell Script 700b9385 - installed 2017-01-14) [Lookup]
User Launch Agents:ⓘ
[failed] com.adobe.ARM.[...].plist (? 560d19c8 0 - installed 2014-01-13) [Lookup] - /Applications/Adobe Reader.app/Contents/MacOS/Updater/Adobe Reader Updater Helper.app/Contents/MacOS/Adobe Reader Updater Helper: Executable not found!
[loaded] com.skype.skype.shareagent.plist (Skype Communications S.a.r.l - installed 2017-11-16) [Lookup]
[not loaded] org.virtualbox.vboxwebsrv.plist (? e782d02b 0 - installed 2017-01-14) [Lookup] - /Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv: Executable not found!
User Login Items:ⓘ
iTunesHelper Application (? 0 - installed 2017-12-11)
(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins:ⓘ
FlashPlayer-10.6: 27.0.0.187 (installed 2017-11-16) [Lookup]
QuickTime Plugin: 7.7.3 (installed 2017-10-25)
AdobePDFViewerNPAPI: 17.012.20098 (installed 2017-08-30) [Lookup]
AdobePDFViewer: 17.012.20098 (installed 2017-08-30) [Lookup]
Flash Player: 27.0.0.187 (installed 2017-11-16) [Lookup]
SharePointBrowserPlugin: 14.7.7 (installed 2017-11-21) [Lookup]
Scorch: Unknown (installed 2015-09-05) [Lookup]
Silverlight: 5.1.20**3.0 (installed 2013-12-05) [Lookup]
DirectorShockwave: 12.2.5r195 (installed 2016-09-01) [Lookup]
JavaAppletPlugin: Java 8 Update 112 build 16 (installed 2016-12-24) Check version
User internet Plug-ins:ⓘ
ZoomUsPlugIn: 4.0.38982.0714 (installed 2017-08-01) [Lookup]
3rd Party Preference Panes:ⓘ
Flash Player (installed 2017-10-25) [Lookup]
Java (installed 2016-10-01) [Lookup]
Time Machine:ⓘ
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 498.88 GB Disk used: 215.45 GB
Destinations:
[redacted] Back-up drive [Network]
Total size: 3.00 TB
Total number of backups: 13
Oldest backup: 10/3/17, 6:25 AM
Last backup: 12/10/17, 3:07 PM
Size of backup disk: Excellent
Backup size 3.00 TB > (Disk size 498.88 GB X 3)
Top Processes by CPU:ⓘ
8% photoanalysisd
8% WindowServer
7% photolibraryd
3% kernel_task
1% ReportCrash
Top Processes by Memory:ⓘ
563 MB kernel_task
133 MB Safari
123 MB com.apple.WebKit.WebContent
111 MB Pages
98 MB Messages
Top Processes by Network Use:ⓘ
Input Output Process name
213 MB 27 MB kernel_task
77 KB 12 KB mDNSResponder
9 KB 13 KB apsd
7 KB 13 KB CalendarAgent
522 B 354 B netbiosd
Top Processes by Energy Use:ⓘ
10.30 WindowServer
1.22 sandboxd
1.10 ReportCrash
1.02 photoanalysisd
Virtual Memory Information:ⓘ
972 MB Available RAM
27 MB Free RAM
3.05 GB Used RAM
946 MB Cached files
0 B Swap Used
Software installs (last 30 days):ⓘ
Adobe Flash Player: (installed 2017-11-16)
Microsoft AutoUpdate: (installed 2017-11-21)
Office 2011 14.7.7 Update: (installed 2017-11-21)
Install information may not be complete.
Diagnostics Events (last 3 days for minor events):ⓘ
2017-12-11 01:30:06 Last shutdown cause: 3 - Hard shutdown
2017-12-10 23:33:04 Messages.app Hang [Open]
2017-12-10 23:20:49 backupd High CPU use [Open] [Details]
2017-12-10 16:10:06 com.apple.WebKit.WebContent High CPU use [Open] [Details]
2017-12-10 14:59:59 com.apple.photos.VideoConversionService High CPU use [Open] [Details]
2017-12-09 22:42:31 mdworker Crash [Open]
Cause: import fstype:hfs fsflag:4909018 flags:4800000007E diag:0 isXCode:0 uti:com.literatureandlatte.scapple.scap plugin:/Scapple.app/Contents/Library/Spotlight/ScappleMetaDataImporter.mdimport er - find suspect file using: sudo mdutil -t 5292594