Archived from groups: microsoft.public.windowsxp.configuration_manage (More info?)
What is the effect on the system of making a limited user temporarily an
administrator (in order to install certain applications, like toolbar
wallpaper, for them) and then returning them to limited user status? Will
this corrupt their profiles or do any damage?
I do it all the time, if I need to install a piece of software, etc. There are no problems encountered. The rights assigned to files, etc. don't change. That user just moves to the administrator group and back to users group when you change it back.