Weird, there have been a number of posts that report conflicts with Kaspersky anti-hijacking and avast.
Perhaps it could be something to do with which program was installed first avast or kaspersky anti-hijacking or are they on different OS systems?. If kaspersky was their first avast thinks it is anti-virus because of the way it works and won't install to avoid conflict. If avast is installed and running ok and you install kaspersky anti-hijack, you may get away with it.
Give it a try, uninstall kaspersky anti-hijacking, reboot, and install avast (if that works ok), reboot and try to install kaspersky anti-hijacking.
Let us know how you get on?