I had ZA Extreme Security installed on my computer under Windows XP SP3 without problems.
When Version 13.3.052.000 was available, I tried to install it.
By the end of an installation I got always an error message (fatal, without specification of the motive).
I used the software Clean.exe each time after obtaining this message.
That did not solve the problem: every time I try a new installation I get the same message.