I have been using ZoneAlarm Free for a few months (Win 7 64bit). After updating it with zaSetup_92_057_000_en.exe I began having major problems.
All downloads would be corrupted files. When trying to access a logon web page with various browsers, I would get the page without the logon fields, without the password field, "SSL Encryption error, a blank page, and other errors. I could not get e-mail through my MSN browser. I could not create windows restore points or do a windows restore. I could not update windows (corrupted file download). After running many virus / malware checking programs I finally uninstalled ZoneAlarm. All of the problems went away.