If you are looking for a free virus protection program to use on your computer, you can download free AVG antivirus software. It is one of the most rated and trusted antivirus and antispyware protection software that is available for Windows and available to download for free.
AVG antivirus features Link Scanner Active Surf shield which helps check web pages for threats, when you are about opening a link. AVG antivirus updates easily and its easy to use.
You can easily configure it with proxies for updates and it automatically removes viruses once it is being detected when a flash drive is connected to your computer.
Note: The AVG Free Download 2013 is available for single use only and non-commercial.
If you have an expired version of AVG Antivirus on your computer, here is how to easily remove it:
1. From start menu goto Control Panel
2. Open Add/Remove Programs (windows xp/vista) or Click on Uninstall programs (Windows 7/Windows 8)
3. Look for AVG Antivirus and click on Uninstall.
After it finish uninstalling, restart your computer and install the newer version of the antivirus program.
I hope this helps.