Macbook Air Running Slow

Hello. I'm trying to figure out what is wrong with my MacBook Air. It is a late 2010 model running High Sierra 10.13.4. It has a 1.6 GHz Intel Core 2 Duo processor with 4 GB 1067 MHz DDR3. It has started running extremely slow and is no longer usable. I checked the activity monitor and it appears that Kernel_task is using up most of the CPU. It does not have this issue in safe mode. I have tried resetting the PRAM and SMC. That made no difference. I tried reinstalling the operating system which didn't help either. Then I wiped the whole laptop and reinstalled the operating system again and the problem remains.

I ran a report on etrecheck and had to try running the report several times to get a full report. Every time I would try to use Etrecheck it would get stuck on "software check " and sit like that until I hit cancel. Finally, last night it was able to get me a full report which I'll post below:

EtreCheck version: 4.2.1 (4C020)

Report generated: 2018-05-01 19:29:12

Download EtreCheck from https://etrecheck.com

Runtime: 98:19

Performance: Poor

Problem: Computer is too slow

Major Issues:

Anything that appears on this list needs immediate attention.

No Time Machine backup - Time Machine backup not found.

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

Obsolete hardware - This machine may be considered obsolete.

Minor Issues: None

Hardware Information:

MacBook Air (11-inch, Late 2010) - Obsolete!

MacBook Air Model: MacBookAir3,1

1 1.6 GHz Intel Core 2 Duo (Duo) CPU: 2-core

4 GB RAM Not upgradeable

BANK 0/DIMM0 - 2 GB DDR3 1067 ok

BANK 1/DIMM0 - 2 GB DDR3 1067 ok

Battery: Health = Normal - Cycle count = 283

Video Information:

NVIDIA GeForce 320M - VRAM: 256 MB

Color LCD 1366 x 768

Drives:

disk0 - APPLE SSD TS128C 121.33 GB (Solid State - TRIM: Yes)

Internal SATA 3 Gigabit Serial ATA

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

disk0s2 () 121.12 GB

disk1s1 - U******d (APFS) 121.12 GB (13.13 GB used)

disk1s2 - Preboot (APFS) [APFS Preboot] 121.12 GB (21 MB used)

disk1s3 - Recovery (APFS) [Recovery] 121.12 GB (515 MB used)

disk1s4 - VM (APFS) [APFS VM] 121.12 GB (1.07 GB used)

Mounted Volumes:

disk1s1 - U******d 121.12 GB (106.26 GB free)

Mount point: / disk1s4 - VM [APFS VM] 121.12 GB (106.26 GB free) APFS Mount point: /private/var/vm Network: Interface en0: Wi-Fi 802.11 a/b/g/n One IPv4 address Interface en1: Bluetooth PAN System Software: macOS High Sierra 10.13.4 (17E199) Time since boot: Less than an hour System Load: 158.77 (1 min ago) 103.80 (5 min ago) 74.40 (15 min ago) Security: System Gatekeeper Status Mac App Store and identified developers System Integrity Protection Enabled System Launch Agents: [Not Loaded] 8 Apple tasks [Loaded] 191 Apple tasks [Running] [Other] 93 Apple tasks One Apple task System Launch Daemons: [Not Loaded] 37 Apple tasks [Loaded] 190 Apple tasks [Running] Launch Daemons: 107 Apple tasks [Loaded] com.apple.installer.osmessagetracing.plist (Apple - installed 2018-03-27) Internet Plug-ins: QuickTime Plugin: 7.7.3 (installed 2018-03-27) Time Machine:Time Machine Not Configured!Top Processes by CPU:Process (count)Source% of CPUmdworker (10)Apple39 softwareupdatedApple29 sysmondApple27 mdsApple23 mds_storesApple21 Top Processes by Memory:Process (count)SourceRAM usagekernel_taskApple376 MBmdworker (12)Apple155 MBmds_storesApple89 MBsoftwareupdatedApple87 MBWindowServerApple63 MBTop Processes by Network Use:ProcessSourceInputOutputmDNSResponderApple177 KB99 KBnetbiosdApple4 KB3 KBapsdApple4 KB2 KBSystemUIServerApple0 B380 Bkernel_taskApple0 B0 BTop Processes by Energy Use:Process (count)SourceEnergy usage (0-100)WindowServerApple3sysmondApple1mdworker (2)1launchdApple0quicklookd0Virtual Memory Information:

Available RAM Free RAM Used RAM Cached files Swap Used 1.86 GB 17 MB 2.14 GB 1.84 GB 0 B Diagnostics Information (past 7 days): 2018-04-29 04:30:03 mds_stores CPU (once) 2018-04-29 04:23:32 fontd Crash (once) End of report