Couple of good choices (Score 1)

If you've got money, you can always try products like CleanSlate, DeepFreeze, or DriveShield. I've used them all in a public setting and prefer DriveShield--it's been very reliable and they have a new product that'll open up at night to let the machines pull down updates. An excellent free choice is to use Microsoft. They've got a product called Microsoft Shared Computer Toolkit that's available for free and came out of the original Gates computer grants to schools and libraries. The original setup has been honed over the years and this product made available for download. Take a look at it. http://www.microsoft.com/downloads/details.aspx?fa milyid=7256D456-E3DA-42EA-857D-92B716077A84&displa ylang=en