Files locked with unknown user

When I go into Bridge and click on my computer >user, to open and view my files, I find that A new user has been added, (which I did not add). This user is not found anywhere else on my computer except in bridge. when I click on this user all of my files are
Iocked, when trying to view them through bridge. The only way I can access my images is to go straight to my pictures folder and right click and choose “open in Bridge”. But that defeats the purpose of being able to browse in bridge. it is a brand new computer and I have continual malware scanning running. I have done a scan and it shows no malware. I contacted Apple support and they said they do not support third-party apps such as Adobe. I am at a loss but don’t know where to go from here. Thanks in advance.