Just some additional info. This is from the ZA Help file:
1. Select Anti-virus/spyware, and then click the Advanced Options button.After the Deep Scan that is performed just the first time after installing ZA, the Scan Mode should change to Normal Scan. That is where mine is set.
2. In the dialog that appears, under Advanced Options, click Scan Mode.
3. Choose a scan:
Ultra Deep Scan - Slowest and most thorough. Scans all files, folders, and archive files (e.g., zipped files). Also includes heuristic scanning to detect malware not yet registered in databases. Note that heuristics that may occasionally result in false positive detections since it detects characteristics rather than signatures.
Deep Scan - Very thorough. Recommended every six months or after exposure to a virus outbreak. Scans all files and folders. Skips archive files which pose minimal risk because they cannot self-activate.
Normal Scan - Fast, default scan. Recommended as your regular scan mode. By skipping archive and non-executable files you get a quicker scan with minimal risk of missing viruses that could self-activate.
Quick Scan - Fastest. Scans only Windows folders, Startup folders, and folders linked to startup items, which are common places for hackers to place viruses. (Programs in these folders can run automatically without permission, which creates the most risk.)
ZoneAlarm Security Suite version:9.1.603.000
Anti-virus engine version:126.96.36.199
Anti-virus signature DAT file version:1021990688