I also used the find function in the Registry to search for DeleteUserSettingsOnUpgrade and it found nothing.
The Registry Key is there.Try looking for it again. It HAS to be there because that's the cause of the problem and now three users have shown that and that the permanent fix is to change the value. It's safe to make a change in the registry only if the instructions are simple, which this is, and if they are logical and make sense, which this also is. And we're right that the mistaken way the value is set to "1" is telling windows INCORRECTLY to default the TouchPad as if it were doing the Windows 10 upgrade each time you restart. And that is what that key refers to. By changing the value to "0", you're telling it NOT to do anything, which is the way it should work, and why it stops the defaulting nonsense cold. I haven't had one single instance of the TouchPad defaulting all the settings after I followed these instructions even after testing with a dozen restarts and fast startups.
The "Default folder" you referred to is NOT the correct folder and you're right in not messing with it because that registry key is for something else and shouldn't be changed. I wouldn't experiment like that either.
If you follow the path exactly as in the instructions, then you should get to SynTP and then the "Install" folder, right under the "Default"folder. When you click on the Install folder, the "DeleteUserSettingsOnUpgrade" is second on the list, after "Default". Try it again and you should see it there. I checked your computer specs and it's also an HP Envy, so it should work the same way.
I will never make any registry changes unless they're already TESTED, are simple and straightforward and make logical sense and ALSO where it's very easy to reverse the change. If the change did cause any problems, it would be very simple to change the value back to "1" I knew it was wrong, but I had already tried that Lenovo driver on my HP Envy and my computer literally would not let me install it because it was "not compatible". You can also backup the registry and /or create a restore point before you make the change,and you should do that, either of which would restore the registry. But changing the value is really very simple and could be easily changed back again. I've had NO new problems caused by that change and it worked exactly liked it's supposed to even after a dozen restarts. Now you have THREE users that it worked for!
Try finding the folder "DeleteUserSettingsON Upgread again and let me know if you were able to find it, because if the touchpad is defaulting all the settings, it has to be there because that's what does it. The proof is that changing the value fixes it and stops the settings default cold.