This window shows the children's profiles added to Kaspersky Safe Kids. A profile with a color picture means that the child is protected by Kaspersky Safe Kids. A profile with a black-and-white picture means that the child does not use this computer and Kaspersky Safe Kids protection is not configured.
Clicking the Protect button opens the Which account does the <child's name> use on this computer? window. If the child does not have a Windows account, you can create it in this window.