Installer is unable to initialize early self-defense with error 0x00000433

During insyallation last version Avast! on newly installed Windows XP PRO SP3 I’ve got a message like it’s written in subject.
Can you help me wwith resolving this problem?

Try using this http://files.avast.com/iavs9x/avastclear.exe You will be directed to reboot into safe mode, click “yes”.
After removal reboot again.
Then re-install avast.
And reboot again.
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