Windows 7: If you have a terminal in your home or business that you want to restrict to certain applications, you don't need a third-party application. Use the built-in policy editor to build a whitelist of safe applications.
Over at The How-To Geek they've put together a tutorial for using the Local Group Policy Editor to create a whitelist of applications. Rather than go through the hassle of trying to lock down everything on a computer to keep customers or kids from causing trouble, you can make a whitelist specifying the applications they can access.
Fire up the editor by typing gpedit.msc in the run dialogue and navigating to User ConfigurationAdministrative TemplatesSystem and then scroll down to "Run only specified Windows applications". From there you can enable the feature and build your list of allowed applications. If you want a step-by-step guide, check out the link below for ample screenshots and tips.
Have a tip for using a built-in Windows tool instead of a third-party app? Let's hear about it in the comments.
Restrict Users to Run Only Specified Programs in Windows 7 [The How-To Geek]