Do you mean you are setting up users which are members of the Guests group? Or you want everyone to log on as Guest (ie, user Guest)? Is this a standalone machine, member of workgroup or domain? Users can only log on with credentials you (as Administrator) give them, so that bits easy enough. With users which are just members of the Users or Guests groups, the problem is often the other way round (ie, they can't run apps you want them too). So first thing I'd do when you've installed all the software is to set up a test users and check all you want will run. If you want to stop users accessing certain apps, one way would be to put 'deny access' permissions on the executable for Users or Guests group.