A method of operating a mobile computing device including at least one image- sensing device and having one or more application programs stored thereon, the mobile computing device using a plurality of stored user profiles, each stored user profile associated with at least one stored user value indicative of a user and including access settings that regulate which application programs can be operated by the user on the mobile computing device, the method comprising: receiving at least one image from the at least one image-sensing device; generating a current user value indicative of a current user of the computing device based on the at least one received image; determining (56, 58) if the current user value corresponds to the at least one stored user value from one of the stored user profiles; if the current user value corresponds to the at least one stored user value (58, YES), retrieving the stored user profile having the stored user value corresponding to the current user value; configuring at least some application programs operating on the computing device using the retrieved user profile, wherein the configuring comprises controlling access to the at least some application programs in line with the retrieved user profile; characterized in that if the current user value does not correspond to the at least one stored user value (58, NO), displaying at least one indicator of at least one stored user profile for selection by the current user; receiving a signal selecting a stored user profile; displaying a request for a security measure to access the selected user profile; receiving a signal corresponding to the security measure for the selected user profile; retrieving the selected user profile after receiving the signal corresponding to the security measure for the selected user profile; and configuring at least some application programs operating on the computing device using the retrieved selected user profile, wherein the configuring comprises controlling access to the at least some application programs in line with the retrieved selected user profile. receiving at least one image from the at least one image-sensing device; generating a current user value indicative of a current user of the computing device based on the at least one received image; determining (56, 58) if the current user value corresponds to the at least one stored user value from one of the stored user profiles; if the current user value corresponds to the at least one stored user value (58, YES), retrieving the stored user profile having the stored user value corresponding to the current user value; configuring at least some application programs operating on the computing device using the retrieved user profile, wherein the configuring comprises controlling access to the at least some application programs in line with the retrieved user profile; characterized in that if the current user value does not correspond to the at least one stored user value (58, NO), displaying at least one indicator of at least one stored user profile for selection by the current user; receiving a signal selecting a stored user profile; displaying a request for a security measure to access the selected user profile; receiving a signal corresponding to the security measure for the selected user profile; retrieving the selected user profile after receiving the signal corresponding to the security measure for the selected user profile; and configuring at least some application programs operating on the computing device using the retrieved selected user profile, wherein the configuring comprises controlling access to the at least some application programs in line with the retrieved selected user profile. displaying at least one indicator of at least one stored user profile for selection by the current user; receiving a signal selecting a stored user profile; displaying a request for a security measure to access the selected user profile; receiving a signal corresponding to the security measure for the selected user profile; retrieving the selected user profile after receiving the signal corresponding to the security measure for the selected user profile; and configuring at least some application programs operating on the computing device using the retrieved selected user profile, wherein the configuring comprises controlling access to the at least some application programs in line with the retrieved selected user profile.