Is Microsoft Security Essentials-Windows Internet Explorer. The only Security I need to ever purchase for my PC? or do I need another security system like "M"-Malwarebytes'Anti-Malware I'm guessing it mostly protects my emails.__Thank You__ampogue

Microsoft Security Essentials protects against malware. With the Windows Firewall enabled with MSE installed and running, the PC is adequately protected as long as you also keep the OS up to date with all offered updated via Windows Update and practicing safe computing such as not clicking on links or opening attachments from unknown sources.
You don't need, nor should you use, any other security software that provides real time protection. You can use other security software, as desired, to scan the PC as long as it does not provide real time protection.
-steve

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~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~

This is an interesting answer, but a little misleading

MSE states that it protects against malware but it does nothing to stop things like FunWebProducts being downloaded and installed in fact it doesn't even recognise it as been an unwanted or potentially dangerous program. Yet Malwarebytes, Superantispyware and others detect it with the realtime shields active and prevent it being installed.

Please go to https://www.microsoft.com/security/portal/submit.aspx and submit a sample of the suspected file(s).

Please choose "Microsoft Security Essentials" in the product field.

-steve 

You don't need, nor should you use, any other security software that provides real time protection. You can use other security software, as desired, to scan the PC as long as it does not provide real time protection.
-steve

You don't need, nor should you use, any other security software that provides real time protection. You can use other security software, as desired, to scan the PC as long as it does not provide real time protection.
-steve

Please note that on Windows 7 x64 and Windows Vista x64 both Malwarebytes' Anti-Malware and Microsoft Security Essentials are both able to run in real-time without conflicts.

On Windows XP (and possibly 32-bit editions of Windows 7 and Vista) adding file and process exclusions to Microsoft Security Essentials prevents issues.

Please see the following link for more information:

http://forums.malwarebytes.org/index.php?showtopic=10138&view=findpost&p=181018

There is another great antivirus software.. that is free but cannot be installed on any computer or gadgets... this Antivirus software are just for Humans. And the name of this antivirus software is "Common Sense 2011" i've found that antivirus on the Net ^_^

Using your Brain+Mind = Common Sense 2011 is a great defense from those viruses/threats to your computer ...WHY? because if u are searching on net , be sure to think first what you are searching for and its importance too. If u dont want for your computer to be eaten by viruses..... So Think First...

MSE + Common Sense 2011 = Great antivirus software

See?