Virus scans have started returning "Anti-virus attempted but failed to scan a file and/or system for viruses." "Error:8004025Dh" for every scanned file.
The Scan Results window reports "No infections were found on your computer" so, without looking at the log files, there's no alert that something is amiss.
License is current. System is XP Pro w/ SP3, MS patches up to date.
ZoneAlarm Security Suite version:8.0.298.000
Anti-virus engine version:126.96.36.1998
Anti-virus signature DAT file version:980821509
Anti-spyware engine version:188.8.131.52
Anti-spyware signature DAT file version:01.200903.5625
Operating System:Windows XP Pro
Product Name:ZoneAlarm Internet Security Suite