Q: Macbook is running slow, mid2010, EtreCheck results

My macbook(mid2010) has been running slow lately. I've read a few threads around the internet that say one thing and others say another so it doesn't really do me any good since I'm not a computer tech. I came across a discussion here that said to run a EtreCheck, problem is I don't understand what I can do to make the computer run faster or how to find the files that are using up my memory and unknown files. Please help and point me in the right direction. Ill delete files, etc, whatever it takes lol. Thank you.

EtreCheck version: 3.0.3 (307)

Report generated 2016-09-05 02:27:38

Download EtreCheck from https://etrecheck.com

Runtime 3:47

Performance: Good

Click the [Support] links for help with non-Apple products.

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

Problem: Computer is too slow

Hardware Information: ⓘ

    MacBook (13-inch, Mid 2010)

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

    MacBook - model: MacBook7,1

    1 2.4 GHz Intel Core 2 Duo CPU: 2-core

    2 GB RAM - Insufficient RAM! Upgradeable - [Instructions]

        BANK 0/DIMM0

            1 GB DDR3 1067 MHz ok

        BANK 1/DIMM0

            1 GB DDR3 1067 MHz ok

    Bluetooth: Old - Handoff/Airdrop2 not supported

    Battery: Health = Normal - Cycle count = 135

Video Information: ⓘ

    NVIDIA GeForce 320M - VRAM: 256 MB

        Color LCD 1280 x 800

System Software: ⓘ

    OS X El Capitan 10.11.6 (15G1004) - Time since boot: less than an hour

Disk Information: ⓘ

    Hitachi HTS545025B9SA02 disk0 : (250.06 GB) (Rotational)

        EFI (disk0s1) <not mounted> : 210 MB

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

        Macintosh HD (disk1) / : 248.83 GB (207.76 GB free)

            Encrypted AES-XTS Unlocked

            Core Storage: disk0s2 249.20 GB Online

    HL-DT-ST DVDRW  GS23N   ()

USB Information: ⓘ

    Apple Inc. Built-in iSight

    Apple Inc. BRCM2070 Hub

        Apple Inc. Bluetooth USB Host Controller

    Apple Inc. Apple Internal Keyboard / Trackpad

Configuration files: ⓘ

    /etc/sudoers, File size 1242 but expected 2299

Gatekeeper: ⓘ

    Anywhere

Unknown Files: ⓘ

    ~/Library/LaunchAgents/com.apple.CSConfigDotMacCert-igorzolotic@me.com-SharedServices.Agent.plist

        /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framewo rk/Versions/A/Support/CSConfigDotMacCert -l /Users/IgorZolotic/Library/Logs/CSConfigDotMacCert.log -u igorzolotic@me.com -t SharedServices -s

    One unknown file found. [Check files]

System Launch Agents: ⓘ

    [not loaded]    7 Apple tasks

    [loaded]    160 Apple tasks

    [running]    63 Apple tasks

    [killed]    8 Apple tasks

    8 processes killed due to insufficient RAM

System Launch Daemons: ⓘ

    [not loaded]    47 Apple tasks

    [loaded]    159 Apple tasks

    [running]    75 Apple tasks

    [killed]    9 Apple tasks

    9 processes killed due to insufficient RAM

Launch Agents: ⓘ

    [loaded]    com.oracle.java.Java-Updater.plist (2016-06-13) [Support]

Launch Daemons: ⓘ

    [loaded]    com.adobe.fpsaud.plist (2016-06-28) [Support]

    [loaded]    com.oracle.java.Helper-Tool.plist (2016-06-13) [Support]

User Launch Agents: ⓘ

    [failed]    com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist (2009-09-06) [Support]

    [running]    com.dtv.vgconnect.plist (2016-02-15)

    [loaded]    com.dtv.vgconnect.uninstall.plist (2016-07-15)

    [loaded]    com.google.keystone.agent.plist (2016-08-31) [Support]

    [failed]    com.seagate.dashboard.plist (2016-07-26) [Support]

    [running]    com.spotify.webhelper.plist (2016-09-05) [Support]

User Login Items: ⓘ

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

    InfiniteHD    Application  (~/Library/Octoshape/InfiniteHD.app)

    Spotify    Application Hidden (/Applications/Spotify.app)

Internet Plug-ins: ⓘ

    FlashPlayer-10.6: 22.0.0.209 - SDK 10.9 (2016-07-15) [Support]

    QuickTime Plugin: 7.7.3 (2016-07-19)

    Flash Player: 22.0.0.209 - SDK 10.9 (2016-07-15) [Support]

    JavaAppletPlugin: Java 8 Update 91 build 14 (2016-06-13) Check version

    Default Browser: 601 - SDK 10.11 (2016-07-19)

User internet Plug-ins: ⓘ

    OctoshapeWeb: 1.0 - SDK 10.8 (2016-07-15) [Support]

    WebEx64: 1.1.0 - SDK 10.10 (2016-06-01) [Support]

3rd Party Preference Panes: ⓘ

    Flash Player (2016-06-28) [Support]

    Java (2016-06-13) [Support]

Time Machine: ⓘ

    Time Machine not configured!

Top Processes by CPU: ⓘ

        18%    kernel_task

         5%    WindowServer

         3%    mdworker(7)

         0%    fontd

         0%    corestoragehelperd

Top Processes by Memory: ⓘ

    289 MB    kernel_task

    174 MB    com.apple.WebKit.WebContent(2)

    131 MB    mdworker(7)

    74 MB    Safari

    63 MB    Finder

Virtual Memory Information: ⓘ

    47 MB    Free RAM

    2.20 GB    Used RAM (490 MB Cached)

    17 MB    Swap Used

Diagnostics Information: ⓘ

    Sep 5, 2016, 01:38:18 AM    Self test - passed

    Sep 5, 2016, 12:21:54 AM    ~/Library/Logs/DiagnosticReports/Dock_2016-09-05-002154_[redacted].crash

        /System/Library/CoreServices/Dock.app/Contents/MacOS/Dock