$AV_NLL folder recently found in my system but used by Norton

Norton 360 for Windows
4

FWIW! This may answer your question about the folder. It appears to be quarantine related, the article specified Avast. Norton owns Avast and I have found Avast folder in drive C: before too. May be related.

https://answers.microsoft.com/en-us/windows/forum/all/avasw-folder/8b63419d-3b47-40f2-acaf-79ea6754e73b

SA