You can use Public PC Desktop to turn your PC into an Internet kiosk or a public access workstation.

It can be setup to completely disable access to files installed on your PC while giving full access to all necessary applications you specify. This way, you create a workstation that can be easily used in any public place, where many people have free access to it, but none of them can damage (whether accidentally or intentionally) vital system''s files or clutter your hard disk with garbage.

You can selectively enable access to any programs installed on your PC so that not only the web browser, but also any other software you specify, can be run and used.
Public PC Desktop is a complete solution and is ideal for public libraries, Internet cafes, information terminals and in-store kiosks. It is also good for limiting activities of your children on your home PC so that they could have full access to the programs you specify, but have no access to the workstation itself...