If the claims are correct, it can not only find root-kits, but create an input/output bubble around the browser to foil key-logging and video capture! I recommend reading the technical specs on PDF for download.
I had been desperately looking for something like that, but I thought Prevx was some old outdated AV from the Windows '98 days. It seems like I heard of it way back when!
It must have its own kernel, because it works at a very low level in the OS layer. I've been fairly impressed with it so far, but I haven't tested the anti-key-logging ability yet. I don't know a safe source to do that. It blocks a lot of bad downloads, so that is probably why I haven't been hit yet.
With XP and limited defenses, Snoopfree Privacy Shield would yield key-logging activity pretty quickly, and block key-logging and video hooking at that layer, but it is obsolete for kernel type root-kits.
I like the cloud based aspect of it, and the scans are lighting fast! However I will never use the removal feature, as it is not recommended by forum members everywhere. The heuristic engine seems to work phenomenally.
The cool thing is, it works with all the other safeguards I have on my honeypot! I have the paid version, but I should have waited as they are giving it away free on Facebook!! The screen-shots show the anti-spyware options enabled for that offer!!
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