In evolution, viruses are an important means of horizontal gene transfer, which increases genetic diversity.
Viruses are considered by some to be a life form, because they carry genetic material, reproduce, and evolve through natural selection.
For antimalware and antispyware, the latest definitions are End of life for Microsoft Forefront Client Security was on July 14th 2015.
This problem occurred nearly 2 weeks ago for me, which does seem to rather coincide with Zonealarms launch of their Free Antivirus and Firewall - coincidence I think not.
I wonder how many AVG users have been tempted to abandon AVG for this very reason and give Zonealarms new package a try.
Thanks again Alan for saving me a lot of time and trouble.
I have been using this program for years now and havent seen anything bad about it, except dat sometimes updates dont want to download, but its easy to use it than other anti-viruses which are way more complicated to use and to find updates, I recommend AVG to every person with a PC @ home or schools too.
For more information see the Forefront Client Security entry at the Microsoft Support Lifecycle site.
You can download the last available definition package, dated July 14th, 2015 for 32-bit or 64-bit.
Windows will automatically download and install updates once a day for you.
If automatic updates aren't working there might be an issue with your PC: You can also force a download of the latest daily update.
This is the same as when Windows automatically downloads the update, and can be useful if you aren't always connected to the Internet or haven't turned your PC on for a few days.
If you want a more recent update (usually uploaded to this page within the last three hours), you can manually download and install it.
This page explains how updates work and where to get them.