I've been using Firefox for quite some time on a 64-bit Windows 7 All in One computer protected by the Xfinity provided Norton Security Suite. This morning, for some reason Norton decided to quarantine my large disk resident compressed in-box file. I suspect the file acquired a single bad email from one of my email accounts, but I have no clue which one and no I cannot look at any of the individual messages Firefox has indexed, all I can see is the header information. I would like to get back most or all of the uninfected mail. Isn't there a way I can be more precise about cleaning up this mess than losing months of email? I happen to have a full system backup stored from which I could recover the quarantined file and only lose a few days, or even better, I'd like to walk my way through the "infected inbox" checking each individual message for the problem so that I can track down where it came from...