Computer security is of vital importance and knowledge of user accounts in Windows is fundemantal part of it. And many times, it is neglected. This book aims to fill a gap in the security and provides fundemental info about users, in both local user database and in domain database. You will see what a local user database is, its relation to the domain database, administrative groups in both databases. You will also see how to manipulate user accounts using classical commands and Powershell commands.