Compatibility Windows Vista 32 Bit(SP1) with 8.0.020.000.en

I am trying since I have Windows Vista to install ZoneAlarm. (With Windows Firewall I already had a Virus)
But Any Version from ZA did without success. It tells me always that it is not compatible. Then I triyed to accept in Windows the Datenausf hrungsverhinderung for ZoneAlarm. But how beautiful life can be - Windows tells me seriously that its not possible to deactivate the Datenausf hrungsverhinderung for ZoneAlarm. Anybody same problem?

Thanks for help...

Operating System:Windows Vista Home Premium
Software Version:8.0
Product Name:ZoneAlarm (Free)