Adobe acrobat standard DC creates a second file with weird name

I recently got my computer upgraded to add more memory space. I'm not sure what the work entailed as it was performed by our external IT admin.

Since then I've had all sorts of issues, with Adobe being one of them.

Whenever I edit a PDF file (removing pages for examples), a new file is created once I hit save. The file has a weird naming convention that begins with "A9R." When I try to open these files I always receive an error message.

I can't do anything with these files, including deleting them. They only disappear once I run Help -> Repair Installation, but this is only a temporary fix as the problem shows up repeatedly. I've already contacted our IT admin but he's not always easy to get a hold of, so hopefully someone on this forum can guide me on how to fix this?