AntiVir Personal Edition comes to us from Germany, and is free for personal use.

PCWorld says:
"This simple but effective antivirus application provides real-time protection by scanning a file every time it is accessed and removing more than 70,000 viruses. The program also lets you scan entire drives--but not individual files or folders--on demand. With AntiVir's basic scheduler and a little tinkering, you can also set up regularly occurring program updates, though not the automatic drive scans that pay-only programs offer."

Several sites that show how end users rate various programs give AntiVir Personal Edition top marks as well.

• Detects and removes more than 70,000 viruses
• Always among the winners of comparison test featured in computer journals
• The resident Virus Guard serves to monitor file movements automatically, e.g. downloading of data from the internet
• Scanning and repair of macro viruses
• Protection against previously unknown macro viruses
• Easy operation
• Internet-Update Wizard for easy updating
• Protection against previously unknown boot record viruses and master boot record viruses
• Quality "Made in Germany"
• Support is free of charge via AntiVir Bulletin Board

I have not used AntiVir yet, but the reviews and recommendations sound very positive. With online support for the program, it has a little more going for it than AVG Free Edition in that respect.