Experiencing multitude of problems having to do with Windows 10 Updater

Hello all, I am reaching out here to try and diagnose some problems that my brother has on his computer that I can't seem to figure out on my own. The main problem seems to regard updating windows, but I have encountered other problems while trying to solve this one. The current update that is queued up is as follows -

"2021-08 Cumulative Update for Windows 10 Version 2004 for x64-based Systems (KB5005033)"

When trying to download this update, the installer will reach about 20% then crash and stop with no error indication, I went to event viewer and this is the error that seems to be associated with the crash - 

Log Name:      System
Source:        Microsoft-Windows-WindowsUpdateClient
Date:          9/1/2021 7:33:35 PM
Event ID:      20
Task Category: Windows Update Agent
Level:         Error
Keywords:      Failure,Installation
User:          SYSTEM
Computer:      DESKTOP-QT2SMDD
Description:
Installation Failure: Windows failed to install the following update with error 0x8024200B: Hewlett-Packard - USB - 2/10/2017 12:00:00 AM - 44.1.2402.1741.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-WindowsUpdateClient" Guid="{945a8954-c147-4acd-923f-40c45405a658}" />
    <EventID>20</EventID>
    <Version>1</Version>
    <Level>2</Level>
    <Task>1</Task>
    <Opcode>13</Opcode>
    <Keywords>0x8000000000000028</Keywords>
    <TimeCreated SystemTime="2021-09-01T23:33:35.7310357Z" />
    <EventRecordID>23676</EventRecordID>
    <Correlation />
    <Execution ProcessID="7248" ThreadID="2028" />
    <Channel>System</Channel>
    <Computer>DESKTOP-QT2SMDD</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
    <Data Name="errorCode">0x8024200b</Data>
    <Data Name="updateTitle">Hewlett-Packard - USB - 2/10/2017 12:00:00 AM - 44.1.2402.1741</Data>
    <Data Name="updateGuid">{c449f03f-0e17-47c1-b602-572a4d79cf69}</Data>
    <Data Name="updateRevisionNumber">1</Data>
    <Data Name="serviceGuid">{8b24b027-1dee-babb-9a95-3517dfb9c552}</Data>
  </EventData>
</Event>

My brother says that the computer had no issues until he installed a different windows update semi-recently but now experiences a multitude of issues. He uses this PC mainly to play games and has little software on it besides the games themselves, an antivirus, and some programs having to do with the hardware of his prebuilt PC. He says that he now experiences inconsistent crashing in his games, as in sometimes they work sometimes they crash, and I have noticed the computer taking an extremely long time to do relatively simple tasks. When I simply attempted to restart it yesterday I was sat looking at the shutting down screen for about 45 minutes (he says he shuts it down and restarts every time he uses it / is done and doesn't just put it to sleep). That being said, the computer doesn't seem to be slow in general, just when performing these OS related tasks I have mentioned. 

My guess prior to writing here was that the update he installed previously had been corrupted or something and was now causing problems. I visited this page - 

https://support.microsoft.com/en-us/windows/troubleshoot-problems-updating-windows-188c2b0f-10a7-d72f-65b8-32d177eb136c

and tried the support under Advanced - Restore and repair system files.

However when I tried the 2 commands listed there in cmd as administrator, I didn't get back what the support said, for the DISM command - 

"

C:\WINDOWS\system32>DISM.exe /Online /Cleanup-image /Restorehealth

Deployment Image Servicing and Management tool
Version: 10.0.19041.844

Image Version: 10.0.19041.1052

"

and then it stops, with no indication of an operation being completed, as well as no longer allowing me to type in the command prompt to retype the command or anything else. The sfc /scannow command returns nothing at all and also doesn't allow me to type anything else in the prompt. I don't know if this is because the operations are still running and I just haven't gotten a return yet, or a problem with the way I'm using the commands themselves but I've been sitting here for 30 minutes waiting with no result still for either of them. My next option from my position is using the "Perform a Clean Installation of Windows 10" tool from the same support page I pasted above. 

This is all the information I currently know about the issues that I could gather. Any help or direction regarding this would be greatly appreciated.