system
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On the subject of false detection in cpav.exe again…
(from the Kaspersky Anti-Virus Personal / Personal Pro 4.5 USER GUIDE) ...The extracting tool...can also deal with some versions of immunizers, programs protecting executable files from viruses by attaching checking code blocks ([b]CPAV[/b] and F-XLOCK) and enciphering programs (CryptCOM) to them.
I guess this (virus-like behaviour of CPAV.EXE) sheds some light on why Avast! 4 detects non-existent virus in CPAV.EXE It also shows that something can be done about it! 