Repeated Crashes and Boot Errors Apparently Caused by Driver Updates

Start with step #11 in post #49.

Step #11 is where I got stuck. I couldn't find any system restore points, and I don't know which option I'm supposed to choose for startup repair.

In the image that you posted in post #50 it displayed each system restore and starup repair.
If there are no working system restore points or no restore points step #11 indicated to move to step #12.
Step #12 indicated to use startup repair.
Which part is unclear or what additional information is needed?

It gives me multiple selections for both system restore and startup repair. Does it matter which one I choose?

When using system restore start with the oldest restore point and keep trying system restore points until the newest restore point fails. Once all system restore points have been tried or if there are none then move to startup repair. If startup repair fails move to command prompt.

I tried all the startup repair options, and they all failed, so I will move on to the next step. Quick question. I used the pre-installed system process to create the recovery drive. Would there be any point in trying some of the other methods (like the downloaded MediaCreationTool or the process zbook outlined), or do they all amount to the same thing?

If the computer does not boot to the lock screen /wall paper there are generally 2 methods for troubleshooting:
1) Attempt to boot into the computer's windows advanced troubleshooting menu
2) Boot into the windows 10 iso advanced troubleshooting menu
The options are a little different.
The computer's windows advanced troubleshooting menu offers:
a) reset with save files
b) startup options > safe mode
3) The above two options are not available on the iso.
Unless you had made a backup image the main options on the windows 10 iso are:
a) system restore
b) startup repair
c) command prompt
4) System restore failed.
5) Startup repair is pending.
6) Then there are many command prompt repair options.

7) The additional options or backup plans are:
a) Boot recovery
b) Local computer store or Microsoft store

I apologize for being dense.... To be clear, you're saying the options may be a little different, but the restore/repair process will be the same; so there's no point in trying another recovery drive format, and I should go on to command prompt?

There are more options if you can open the computer's windows advanced troubleshooting menu.
(There are more click options as there are reset and safe mode options)
When opening the computer's windows advanced troubleshooting is not available another option is to use a bootable drive that has a windows advanced troubleshooting menu.
Clicking the system restore or startup repair is a sit back and wait procedure.
It's an all or none method. It either works or it doesn't.
The command prompt is a command > result method.
Each command and result is reviewed to see if you can get to the desired result.
Some commands get the desired result and some don't. Then if there are other commands you can try various approaches to get more information on and fix the underlying problem.
So when system restore and startup fail the next step is command prompt.

What did you mean by recovery drive format?
If you have a backup image then you have options(for example Macrium, Acronis, Aoemi, Paragon, etc.)

I created a recovery drive using the "create a recovery drive" tool through this computer's Control Panel, before you posted your steps. But as you have described, you can also download a tool to create Windows 10 installation media; I just wanted to make sure the results are the same, and there is no point in recreating the recovery drive through the latter process.

I gather not. I'll try the command prompt steps next. Thanks again for all your help and your patience.