The issue is not about the administrator but the "owner" of the files in question. I will not attempt in this reply to explain why you get this message instead of a proper "You don't own these files."
Here's an article about TAKING OWNERSHIP of files in XP -> http://support.microsoft.com/kb/308421
I would take ownership of the Microsoft Money files in "C:\Program Files"
Windows XP Home Service Pack 2, Athlon 1.20 g, 120 gig hd
A couple weeks ago we upgraded Money 2005 to Money Plus. My wife did this under her user name. We have 4 profiles with 3 of them listed with administrative rights. The only user name that can be used to start this program is my wife's. When I try to strt the program from my profile, nothing happens. The icon for the program is a square desktop icon, not the usual exe type program icon. The other 2 profiles have the same thing. If I try to install the disk under my user name, I get the message that I don't have administrative rights ( even though I am listed as such ). I have gone in under safe mode and created another account with administrative rights and tried to install the program, and get the same message. Bottom line, only one name has administrator rights and Plus can only be accessed off that user name. Have not had any problems with this os, or machine for probably 3 years. Really don't want to start over from scratch if possible. Any help would be appreciated !