Wow. I find your situation unique, and I'm sure everyone else hopes it's unique too! But your determination, and ability to relate this information is invaluable.
In looking through your solution, and something stuck out to me. "DELL" was referenced in your streams about uninstalling the audio. It made me wonder if the issue may be related to prebuilt systems. HMJunior also referenced a laptop, almost assuredly prebuilt.
The customers that I referenced were both prebuilt. My system,Ibuilt, and no update has failed. My second system, I built, and no issues. My two laptops, I rebuilt, and they both updated smoothly. Now, I'm gonna be bata$$ crazy until I figure out if this is a prebuilt issue. I'm sure not ALL prebuilds had issues,
but I'm not sure if I saw any who explicitly stated DIY systems having this issue.
Lance, I'm glad you got it done, and hopefully, others with these issues can benefit from your detailed diagnostics.