When in the Computer (or browsing a folder) click on 'Organize' at the top.
The folder options is in there. Took me a bit to find it too
"joseph bell" <ajabell_3@hotmail.com> wrote in message
news:B171D22F-9726-484D-80E3-A215686FE939@microsoft.com...
>I can not find the option to open files, etc. with single clicking instead
>of
> double clicking. XP gave this mouse option in folder options section.
> Where
> is this option in Vista?
> --
> ajabell