I haven't tried it, but I think it will do what you're looking for.
"Peter" <email@example.com> wrote in message
> Is there any way this can be done?
> I recall adverts about a year ago for a product which did with the
> Windows O/S itself; it loaded a fresh copy from the disk.
> The reason I want this is to remove any unwanted cookies, windows
> wallpapers/screensavers, viruses, you name it, just by shutting the
> machine down. It is for a children's internet PC.
> Return address is invalid to help stop junk mail.
> E-mail replies to peter1234@peter2000XY.co.uk but remove the X and the Y.
> Please do NOT copy usenet posts to email - it is NOT necessary.