Here's my experience with Thunderbird and Win7. I migrated a user from their old XP box to a Win7 box. They used POP3 email, always downloading the email to the XP box and then deleting it off the server. They didn't sort their mail into any folders other than the Inbox, Sent Mail, and Trash folders that Thunderbird provides by default. The XP box had F-Prot antivirus on it.
For their new box, I got a refurbished Dell with Win7 on it. Since this PC originally shipped with Vista, the refurbisher didn't restore the OS image that came from Dell; they installed it from a "clean" Win7 CD. I ran the PC for a few days in the "as found" condition to make sure the hardware was OK. I then removed the hard drive that was in it, installed a newer blank hard drive, and did a fresh install of Win7 to that hard drive. Then I installed the latest version of the apps they had on their XP box, including Thunderbird. I was doing this right after Christmas - a couple of weeks ago - so it was whatever version of Thunderbird was current at that time. I also installed F-Prot antivirus on the machine.
To migrate their email, I followed the directions on the Thunderbird web site to copy the profile directory from the XP box to the Win7 box. I then started up Thunderbird and it Just Worked[tm] - it could log into the POP3 server and retrieve mail, and all their existing mail was there in the Inbox, Sent Mail, and Trash folders.
On Win7, the only "maintenance" thing I did to Thunderbird was to delete most of the emails in the Trash folder (mostly spam) from within Thunderbird. I then right-clicked each folder in the Thunderbird folder list and selected "Compact". This made the Trash folder file much smaller, but didn't do much for the Inbox and Sent Mail folders.
That PC has been with the user for about a week and half now and I know they've used their email in that time. No complaints so far.
Possibly useless information: At least for POP3, Thunderbird stores email in basically flat files, one file per folder, with (IIRC) a separate index file. If you delete an email, it's just marked "deleted" in the flat file; Thunderbird doesn't re-write the whole file to remove the deleted message. Over time, this can make the file kind of large. When you tell Thunderbird to "compact" a folder, it reads through the entire flat file for that folder, and writes a new file containing only messages that haven't been deleted. It also updates the index file as it does this. Finally, it replaces the old folder file (with deleted messages) with the new one and life goes on.
I don't know.
I did the "Manually moving files" method in
I think I'm going to join my voice to the "dump McAfee" chorus. First try uninstalling it. If that's not possible, or you think it hasn't uninstalled all the way, look in Task Manager to find the names of the McAfee processes that are running, and try to match those up to the .exe files in (probably) "C:\Program Files\McAfee" or (maybe) "C:\Program Files (x86)\McAfee" or similar. Then boot into Safe Mode, go into that directory, and rename the relevant .exe files to .xex. Then reboot normally and see what happens.
If McAfee is currently installed in the "Program Files (x86)" directory, that could be part of your problem. That directory is for 32-bit programs, which "mostly" work OK on 64-bit Win7 - mostly. If you bought this computer new recently - like within the past year or two - they
*should not* have installed a 32-bit antivirus, but OEMs do all kinds of dumb things. Getting a 64-bit version of whatever antivirus you would like to use would be better.Standard disclaimers apply: I don't get money or other consideration from any companies mentioned.
Matt Roberds