Update Microsoft Security Essential behind proxy

Problem

---------------------------
Microsoft Security Essentials
---------------------------
Virus & spyware definitions update failed

Microsoft Security Essentials wasn't able to check for virus & spyware definition updates.

Make sure your computer is connected to the Internet and try again.

Click 'Help' for more information about this problem.

Error code: 0x8024402c

Error description: Microsoft Security Essentials couldn't install the definition updates because the proxy server or target server names can't be resolved.
---------------------------
OK Help
---------------------------

January 2010 update:

To cut a long story short, MSE is using different proxy settings from IE. This is according to How the Windows Update client determines which proxy server to use. So, even if the logged in user is using a certain manually configured proxy, Windows Update is not and is trying to connect directly. So the trick is to use proxycfg.exe. I simply typed the following on the command line:

proxycfg -u

and, presto, all udpates went through! The -u option copies the proxy settings from the currently logged in user.

proxcfg has gone missing in Windows Vista and Windows 7. You should use netsh then. The equivalent for the above is:

netsh winhttp import proxy ie

Hope it works for you too.

Refer

• http://all-things-pure.blogspot.com/2009/10/microsoft-security-essentials-network.html
  
• http://msdn.microsoft.com/en-us/library/aa384069(v=vs.85).aspxhttp://all-things-pure.blogspot.com/2009/10/microsoft-security-essentials-network.html
• http://support.microsoft.com/kb/900935
• http://www.edugeek.net/forums/how-do-you-do/64602-updating-microsoft-security-essentials-when-behind-proxy.html