Hidden Q: drive in Microsoft Office 2013

What is the current status of NIS 21 and the hidden Q: drive that Microsoft Office 2013 installs?  I have seen a couple of old postings on here from a couple of years ago that said Norton could not access the hidden Q: drive, at least at that point in time.   Has that changed in the last 2 years?    Can Norton access the hidden Q: drive to scan/protect files?   It would make me nervous to have a hidden drive that Norton can't protect.   Thanks for any info.