I've used Deep Freeze a few times when I've needed to setup a Windows machine for public use or in a lab. Users can do whatever they want on the computer including installing programs, make registry changes whatever and it's all gone, back to normal on reboot. Deep Freeze is a commercial app, but it's pretty reasonably priced and works great.
Slashdot Mirror
I've used Deep Freeze a few times when I've needed to setup a Windows machine for public use or in a lab. Users can do whatever they want on the computer including installing programs, make registry changes whatever and it's all gone, back to normal on reboot. Deep Freeze is a commercial app, but it's pretty reasonably priced and works great.