ClamWin is a Free Antivirus program for Microsoft Windows 10 / 8 / 7 / Vista / XP / Me / 2000 / 98 and Windows Server 2012, 2008 and 2003.
Is anyone using it? Is it any good?
Well, nothing I would use… 
Certainly the wong place to ask. People on this forum, except for a very small group, all use Avast.
It’s OK to ask in this forum section. (My answer wasn’t biased)
Neither was mine. 
It is one of the most used mail server antivirus. Many ISP that provide mail use it since it is free/open source
to get realtime protection you need to install Clam Sentinel >> http://clamsentinel.sourceforge.net/
I think it is the only AV that still run on W98
Is anyone using it? Is it any good?http://blog.clamav.net/2011/03/top-5-misconceptions-about-clamav.html