Work on my Leo 10.5.2

just use this steep by steep:
After the installation, NOT TO START IT and DONT REBOOT TO
open folder "/Library/Application Support/Kaspersky Lab/KAV/",
change the right of access to the file "config.xml" and open it (Textedit)
find the lines: (at the end)
<tSTRING name="">Product</tSTRING>
<tSTRING name="enabled">1</tSTRING>
<tSTRING name="persistent">1</tSTRING>
in the line "<tSTRING name="enabled">1</tSTRING>" replace 1 by 0.
save it, enjoy
nota: I have re-enable KAV with Setting button, and now work.