The instructions are flawed, especially #3. There is no "Hide all Microsoft services" tab in Msconfig.
**The correct procedure is to enable "Hide all Microsoft services" and then click Disable all.**
Here are the official instructions: How to perform a clean boot in Windows - Microsoft Support.
(Src: Microsoft)
Resolution:
Now, to fix the problem, use one of the methods below:
Option 1: Re-enable the default services
Use the method described in this post to re-enable the default services.
Diagnostic Mode "Something happened and your PIN isn't available" Boot - Microsoft Community
Option 2: Enable the password sign-in option
Enable the password sign-in option if you remember your account password.
Ref: Error “Something happened and your PIN isn’t available” in Diagnostic Startup
(You may find this procedure somewhat tedious compared to the other two methods.)
Option 3: Do a System Restore rollback
Please boot into Windows RE and do a System Restore rollback. From the login screen, press and hold the Shift key, and click Restart. This boots the computer into WinRE. Click Troubleshoot → Advanced Options → System Restore.
[Screenshots → Perform System Restore Rollback Offline via Windows RE.]
You may be asked to type the account password.
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