Windows 8 Action Center explained

Windows 8 Action Center is a new version of Vista and Windows 7 Security Center. Action Center can be found at Control Panel >System and Security > Action Center. Action Center provides solutions to your PC problems.

Network firewall - This setting alerts you when windows firewall is off
Windows Update - Ensures window updates are on.
Virus Protection - Ensures system has AntiVirus installed
Spyware and unwanted software protection - Ensures Windows Defender is running.
Internet security settings - Ensures IE security settings are at their recommended levels.
User Account Control - Ensures UAC is on.
Network Access Protection - Ensures Network Access Control client is running.

Windows 8 Action Center