It does happen, says security firm BitDefender, and the result is more mutant than mutt. The spontaneous software offspring might be dangerously unpredictable, and it can be harder to defend again, BitDefender says. There are so many computer viruses flying around out there that they can't help bumping into one other while wreaking havoc on our computers. In fact, virus writers account for this. In order to protect and defend a hard-won compromised computer, some virus writers actually install their own antivirus programs after they infect a PC.
