This zonealarm extreme security is making me extremely nervous. Antivirus scan hangs on manual or auto scans. I reported on Sunday it hung at file c\windows\_default.pif. Tonight I went into advance options and took _default.pif out of the scan then I ran another scan this time it hung at zllsputility.exe. When I look at the event log all windows files have error: 8004025Dh, anti-virus attempted but failed to scan file or system. When it does unhang it tells me no virus found. How can I believe this? Any ideas anyone?

Operating System:Windows XP Home Edition
Software Version:8.0
Product Name:ZoneAlarm Extreme Security