Concerning toKaspersky Internet Security 7.0/2009 (all builds)
Let's take a look at how Parental Control works:
1. The user logs into the system.
if the account being used to log into the system is not assigned any of the available profiles, the most restrictive Child profile is loaded by default
if the user account is linked to a certain profile, that profile is loaded.
2. The user accesses a website while using the computer under the user account controlled by the active profile. A verification is performed for access time limitations. The URL of the requested page is scanned and matched against the white and the black lists, and page content is analyzed to determine whether it falls under disallowed categories. In the event that after the above actions are completed no time constraint is discovered, the web address is explicitly specified in the white list and is not listed in the black list and in the event that the page is not in a disallowed category, it is loaded into the browser window. If even one of these conditions is not met, the website is blocked.
3. The user is not given access to the requested website because of the restrictions on the active profile. For example, profile with substantial restrictions is currently active. If the user has access to the password for a profile other than the active one, he/she can switch to that profile.