I recently reformatted my hard drive and reinstalled Windows XP (I know I'll have to take the plunge and commit to Win8 "real soon, now", but I'm just not quite ready for the upheaval yet! :)

I used to use WinRar (and later, when I got fed up with the "nag" messages, 7-Zip), but I haven't installed either of them in my new configuration, so I must be using the built-in XP facility when I open *.zip files.

For years, I've been opening downloaded *.zip archives, and using "drag & drop" to copy to a File Explorer window open on the folder where I want the files to end up (usually, My Documents\Downloads).

But now I find that when I "drop" the file(s), I get a pop-up Windows Security Warning saying

Are you sure you want to copy or move files to this folder?
You should only move or copy files from locations that you trust

Can anyone explain why I'm getting this message, and is there any (reasonably easy, please! :) way to suppress it? Since I've already put the *.zip file on my computer, it seems a bit late to ask if I trust it.

(Thus far, the files in question have always been plain text, so it's not a matter of dodgy programs, etc.)

Apologies for the low quality image - I don't have the appropriate tools or knowledge to do any better, and it doesn't help that my "PrtScr" screen capture has included what would have been on my second monitor (TV) if it had been turned on. If you can't read it, trust me - I have copied the text verbatim.