The Virus Bulletin not very good, but partly very detailed.

You rather won't find the newest alerts there, but deep analysis of viruses.

By the way, I use F-Prot for DOS.

When you find a big kettle of crazy, it's best not to stir it.
--Dilbert cartoon

"Interplay.some zombiefied unlife thing going on there" - skavenhorde at RPGWatch