FWIW, still have Symantec's NAVOS2 installed on this system  Symantec is
still providing signature files, so every now and then, I pull updated
signatures and run NAVOS2, just to see if it still runs, which it does.  I
have no idea how good the signature coverage is compared to any of the
other AV tools.

The Symantec signature files are way larger than ClamAV's - about 500MB.
However, since NAVOS2 was written with 32-bit systems in mind it does not
run out of memory.

Steven