I am using Microsoft Security Essentials as my anti virus programme but have receive a message from Windows security cenrtre advising that my PC may be vulnerable. Can you please advise what this message may mean and why Security Essentials may be insufficient protection?John hay

It means that the definitions are not fully updated. Open Microsoft Security Essentials, click on the Updates tab, and click the Update button.Rich Prescott | Infrastructure Architect, Windows Engineer and PowerShell blogger | MCITP, MCTS, MCP Engineering Efficiency @Rich_Prescott Windows System Administration tool 2.0 AD User Creation tool

Hi Rich, thanks for your speedy reply. According to Security Essentila I AM up to date and secure. However, it is Windows security cenrtre that advised that I was NOT secure.!!John hay

It should list the reasons that you are not secure if you click on it. Please provide more information.Rich Prescott | Infrastructure Architect, Windows Engineer and PowerShell blogger | MCITP, MCTS, MCP Engineering Efficiency @Rich_Prescott Windows System Administration tool 2.0 AD User Creation tool

It tells me to "update one of my antivirus programmes...". I am using Firefox if this is significantJohn hay

Hello JohnnayXP, Make very sure you are looking at Windows 7 Action Center. Windows-key >> Control Panel >> Action Center. In the Security block, click on down arrow & review what it says fo all lines. Especially for firewall, virus protection, spyware protection. Make sure UAC is on. Make very sure the "message" is not coming from a "rogue" program that may have slipped in recently. Close your Firefox and any other browsers. Start MSE, do an Update run, then a quick scan. Follow that up with the MS Safety Scanner http://www.microsoft.com/security/scanner/en-us/default.aspx to get another check. As a sidebar, make sure you are current with Windows Update. and also, in Firefox, use the Help >> About to make sure that FF is current.Maurice Naggar ~ MVP (Oct 2002 - Sept 2010)

Thanks very much Niki I completed your suggestions, The MSE found no infections; the MS Safety Scan also found no infections. The Security centre ("action centre" in your words) states that all are "ON". The issue appears to be resolved and I am very grateful!! Regards JohnJohn hay