Re: It's not just Kaspersky
> in many cases all the AV software would have to do is "fail" to detect an approved Trojan arriving via some method. It would be hard to "detect" that.
That's why you periodically use a different scanner eg. MBAM/HitMAnPro - ideally from a boot stick so that there is no trace of it on the HDD in normal operation, so the trojan can't apply the appropriate cloaking strategy.