Advanced Security Level is a tool to keep the security of a PC by giving different access rights to users.
The Advanced Security Level administrator can decide which type of restrictions are applied to each user. These restrictions can be to certain programs, network access, to printers, to the add/remove programs option, etc. It also lets you personalize the desktop for each user with their own start menu, favourites, documents, etc.
From Advanced Security Level you can also hide the desktop icons so that certain users can`t see them, and disable certain menu options. This way the PC (or PCs) are much more protected, as only a few preselected users can access the most delicate and important PC areas.