A security vulnerability has been found in the popular Kaspersky AV. This includes more than just their Antivirus program, because the vulnerablity lies in a library shared among many of their programs. The vulnerability would allow certain files to get into the system unchecked and arbitrarily execute, rendering the system compromised. Although no official comment has been offered yet from Kaspersky, a flaw of this nature will not go unpatched for long. As the article points out, as Windows XP (and other versions of Windows) become more secure as time goes on and as patches are offered, folks will begin looking for other points of entry into the system, usually starting with the two next most common pieces of software (aside from a browser): Anti-virus and firewalls.