I have a Windows XP Professional machine we want to use in our showroom for customers to access our website. It is not on a domain. I want them to use the "Guest" account built-in to Windows XP. However, I want to lock down many apps and features so that they cannot be accessed by a user logged on as "Guest". Specifically I want to make sure they cannot access explorer.exe by right-clicking on the Start Menu among other things. I have tried GPO but cannot find any of the options described in other solutions. Please advise!