Heh, the mimail and mydoom viri are actual the same one, named differently by the different antivirus companies, as you can see in the "Also Known As" column at <http://securityresponse.symantec.com...email@example.com
And yes, that was the virus I was talking about, though I didn't know the assigned names for it at the time I made the initial post.
As for making my computer secure, don't worry. Except for a Junkie boot sector virus on one of my current FAT partitions (can't remove it since I have no floppy drive and AVG requires a floppy boot to remove those, but it's not making any damage either) no virus infection has penetrated my systems since my old 286. And I actually got the Junkie virus because I ran a floppy image of an old game taken from my 286 computer.
(As a note, Novarg/MyDoom/MIMAIL exists in several different strains. They are not all the same, but the A strain is.)