Despite all the precautions I have retracted a worm recently, the, this program could not identify. A short message to the support and a day later the answer was there with a link to a special software and a detailed instruction on how to proceed was thus. And the worm was discovered and rendered harmless!
The resources required by the system to run Kaspersky IS are minimal and together with the favorable price is Kaspersky Internet Security antivirus software per se.
Meanwhile, I'm working also with Kaspersky Mobile on my HTC HD2 and recommend it as well.