I don't remember if the XLN installer asks you the "everyone or just you" question. Native Instruments Komplete installs all of its user directories in the Public Documents folder (everyone), as do several others. If there's a way to tell the XLN installer to install for everyone, maybe those 5 folders will install to the Public Documents folder, so you won't see them. The path:
C:\Users\Public\Documents
instead of to the individual user account (in my case: Primary)
C:\Users\Primary\Documents