Installation and Updates - Non Admin

Hi guys, just wondering can Dragon be installed individually by non-admin users ?

For example, family desktop, windows XP, only one admin

But admin would like each user to be able to keep Dragon up to date - Instead of a user seeing an Update available notification but not being able to install (what if admin is away for a while, and new exploits come to light which is fixed in the latest Dragon which nobody can update)

I think the above scenario would probably require a separate install for each user (can this be done?), but that would be fine.