Don't know where to post it, but I have this problem with Thunderbird (2.0.0.22): For a month or 2, occasionally, he proposes to upgrade to 2.0.0.23 Sometimes he tries to get the needed files, without success, sometimes he actually gets the needed files (10 megabytes or so), sometimes he actually tries to upgrade the program, sometimes he does not manage to restart the program after when he asks to restart the program (he does manage to stop it, not to start it) ... ... but, I always end up with 2.0.0.22, and I NEVER see an error.

Download Thunderbirds current version manually and install it over the existing one.

That's the part I would like to avoid, since it would be admitting that the upgrade feature does not work. OK, tried to download and install latest version: - installation failed cause of locked DLL, even with Mozilla Thunderbird stopped - after installation, he says I have 2.0.0.23, but he still wants to do update (apparently, something is still thinking update is necessary) Good job Mozilla, almost everything fails ! I'm having a deja-vu, there was some software I had recently, doing exactly the same, it always wanted to upgrade, and upgrade always failed.

If a former automatic update has not finished correctly, there is a folder in the thunderbird program folder, named update. Delete all files in this update folder, while thunderbird is NOT started. After that, start thunderbird and try update again.

Hmm OK, that sounds interesting, it looks like the kind of stuf that could fix the issue. Unfortunately ... well, maybe not, currently all seems OK. I've restarted both Thunderbird and my computer (after manual upgrade), and TB is telling me (for the first in a long time) there is no update to perform. There's also no "update" folder, there is however an "updater.exe" and an "updater.ini" I'll keep an eye on that folder, next time. Does the same apply for Firefox ? I've seen Firefox do upgrades, but there it always works.

I had this issue with Firefox in the past and figured out, that there is exactly this update folder. Any time I started Firefox, it began to update automatically and never finishes. Then I decide to delete the update folder and started Firefox and it did not try to update automatically. Then I started the update from the help menu and it worked.