Why was the elevator summoned?

I have periodically run into problems with the Windows 7 UAC elevator. Not always just with DOpus, but it is often the instigating agent. Most recently I've been having a problem when moving files from a local drive to a location on the network. I'm running at Administrator level on the local PC and usually have no UAC issues with moving files around locally. I've done my best to set things up so the network drives allow full capabilities to everyone. (The Windows security thing may be a great idea in theory, but in practice it's seldom anything but a PITA.) When I move files from the local drive to any of the network drives, it appears to copy the first file of the batch (I can watch the progress bar as it's copied) and then the UAC elevator warning pops up. I tell it that, yes, I want DOpus to actually do what I just told it to do, and the operation proceeds. Subsequent files in the same batch do not activate the elevator.

If someone can assist with this issue, great, but my primary question concerns the UAC elevator. Does anyone know of a way to get the popup to give me any hint of WHY it thinks it needs to ask me for special permission? I'm sure I could resolve this issue on my own if Windows would only tell me what exactly is triggering the UAC elevator. (I know, it's silly to think Microsoft would provide useful information about anything it thinks might be a problem.) In this case it's obviously something in the move operation, but since it seems to copy the file before getting upset, I figure it has to be something to do with deleting the file from the local machine or possibly something concerned with updating permissions on the target machine.

I realize this isn't specifically a DOpus issue, but this was the best place I could think of to ask the question.

If you do the same operation using Windows Explorer, do you also get a UAC prompt?

UAC prompts will happen when some operation fails with an 'access denied' error. It isn't always the case that UAC-elevation will solve the error ('access denied' can mean a lot of things, and there is no real way for a program to know if it's due to a lack of elevation, without simply trying it and seeing if it succeeds), but often that's what it is, due to file permissions etc.

You only see a UAC prompt for the first file because after that the entire copy/move operation is elevated.

(As a follow-up to Leo's reply: Note that you won't get a UAC prompt from Explorer unless you have modified your UAC settings to "Always Notify").