Security and Maintenance (formerly Action Center and Windows Security Center) is a monitoring component of the Windows NT family of operating system. It monitors the security and maintenance status of the computer. Its monitoring criteria includes optimal operation of personal firewalls, anti-virus software and anti-spyware software, as well as the working status of Network Access Protection, Windows Update, User Account Control, Windows Error Reporting and Backup and Restore. It notifies the user of any problem with the monitored criteria, e.g. when an antivirus program is not up-to-date or is offline.