Administrator Rights?

[<dmorrow5 () satx rr com>]

I'd like to think I'm somewhat computer savvy, but this one escapes me...running XP, trying to run Windows Update. All 
but one or two updates will fail. I've done some research that suggested a necessary service may not have started, but 
this is not the case. When looking at the user account, they are designated as Administrator. However, Windows Update 
says it won't install the updates unless it's accomplished by an administrator. Any suggestions?