after having re-installed ZA (had had za running properly, with xp sp2, but installed with the above warning) - after update xp to sp3, all related udates done, adjusted few progs to new version, (secunia), all these steps with reboots,checks,cleaned, etc. re-uninstalled za for a last check, re-checked (appremoval), re-cleaned (ccleaner), cleaned (ZAremovaltool), restart, set off windows security firewall and antivirus, and installed za.
but the warning came back.
no event noted in event-viewer (just notices all components successfully installed)
then updates downoaded successfully

and za works fine !

so it seems to be a minor issue ?

thank you for your support !
xp sp3
ZoneAlarm Extreme Security version:

vsmon version:
Driver version:
Anti-virus engine version:
Anti-virus signature DAT file version: 1080454496
AntiSpam version:
ZoneAlarm Browser Security: 1.5.359.0
ZoneAlarm ForceField Spyware Scanner: 1.5.359.0
ZoneAlarm ForceField Anti-Phishing Database:
ZoneAlarm ForceField Spyware Sites Database: 04.155