As I mentioned, I cannot access any Web sites unless I turn off Web Shield in Avast. David, if you happen to read my message here, are you saying that I should delete every and all entries for Avast! in my Zone Alarm firewall and then reconnect to the Internet? There are several entries, one for Web scanning, one for e-mail, one for virus updates, etc. When looking at the file names of these in the firewall, some of the file names have Avast 4 in them and others have Avast 5. I have Avast version 5.0.418. Once I reconnect to the Internet and Zone Alarm asks for permission again, will it add version 5 of Avast to its list? I was told by Avast technical support that Web Shield needs firewall permission to access the Internet and that ashWebSv.dll must be listed in the firewall. It isn't. The only thing close to it is in the Avast Web Scanner, and the file name listed is C:\Program Files\Alwil Software\Avast4\ashWebSv.exe. This is one of the entries that has Avast 4 in it instead of Avast 5. Thanks for your replies and patience.