In Windows 7, 8 and 8.1 it is called Action Center. In Windows 10 it was renamed Security and Maintenance
Security and Maintenance (formerly known as Action Center, and Security Center in earlier versions) is a component of the Windows NT family of operating systems that monitors the security and maintenance status of the computer. Its monitoring criteria includes optimal operation of antivirus software, personal firewall, as well as the working status of Backup and Restore, Network Access Protection (NAP), User Account Control (UAC), Windows Error Reporting (WER), and Windows Update. It notifies the user of any problem with the monitored criteria, such as when an antivirus program is not up-to-date or is offline.