Thank you for your post, but the run command you suggest is functionally the same as mapping the drive from within File Explorer, and it similarly is asking for a password.
I did receive a call from a tech at Bell, as Virgin have very limited tech support locally, and they outsource this to Bell. Not optimal, because Bell techs are less familiar with Virgin equipment. She did have a promising suggestion, to try the installation technician's username and password, which I still had, but this unfortunately did not change anything.
I am currently pursuing it with Microsoft, now up to level 3 for a Monday call. Not sure how many levels they have, but they've been thorough and persistent in their efforts to help thusfar.
My if all else fails solution would be to run Valerie as a simple modem, and attach a more capable router.