MSFT has deemed .wmf and animated .gif files to be archaic and/or dangerous,
so Windows Explorer won't show them.
You can view them with IrfanView...
http://www.irfanview.com/
--
Windows 7 beta
http://get.live.com/wlmail/overview
http://download.live.com/wlmail
"Amer" <> wrote in message
news:EBE8A5A0-E173-4B51-A2E3-...
> I used to be able of seeing thumbnails and previews for .wmf files in
> Windows
> XP, but never the same in Windows Vista.
>
> How to make Windows Vista able to generate previews and thumbnails for
> these
> files?