I'm pretty sure everything is functioning correctly and my system is running smoothly.
I have noticed that the first time I ran OTL, when I enabled Norton after it, and then ran a scheduled full scan, it picked up the "_OTL" folder and deleted it. Should I run the scan again to delete it or just leave it there?
Norton wouldn't have deleted the whole folder, but would have detected files from within that folder, as that is now where everything is as my quarantine folder.
Disable Norton
Start OTL again but this time click the Black CleanUp button, then make sure the C:\_OTL folder is deleted.
After that you are free to go on your merry way. You are now fixed / Solved.
If you want Malwarebytes download the Free version to install and don't click the Trial button
If you want to, you can turn off System Restore wait for it to clear the Restore Points and then Turn it back on once you find all is happy. today, tomorrow whenever.