Permissions can be set for individual users, groups of users, or for a specific computer. Usually, this message appears if ...

Permissions can be set for individual users, groups of users, or for a specific computer.  Usually, this message appears if you are using a network to which administrators have applied permissions for specific users and groups, or if you are accessing a resource local to a specific user's computer, but are blocked because of local permissions that have been set by that user. If you cannot open a resource on a file server or other computer on your network, you will most likely need to review your user account settings to determine whether you have the necessary permissions to gain access to the resource. If you do not know whether you have the necessary permissions, contact your network administrator or the owner of the computer with the shared resources.