PortableApps.com - Thunderbird Portable

error code 0xC0000020.

maki.bkk — Thu, 23 Oct 2025 07:56:19 +0000

After updating the Thunderbird application, I encountered error code 0xC0000020. Reinstalling the app results in the same error, and attempts to install an older version of Thunderbird also fail. How can I resolve this issue?

Forums:

Thunderbird Portable

Problem creating new account

MRWORNAX — Sun, 05 Oct 2025 15:35:05 +0000

Hi,
Environment: Windows 11, 64Bit

I have a problem creating an account. After entering Name and EMail-Adress, a window with turning circle appears and nothing happens anymore.
I have tried other accounts and they immediately were created. What could be the problem here? There is no error-message.
Is there a possibility to create manually an account?

Thanks for your support
GB

Forums:

Thunderbird Portable

Start minimized Thunderbird Portable

Spra — Wed, 01 Oct 2025 14:22:26 +0000

Hi, Can you start thunderbird portable minimized?

Forums:

Thunderbird Portable

Cannot log into Zoho server

mozfan — Tue, 23 Sep 2025 23:33:44 +0000

Nothing changed. SMTP apparently works as it sent my support reuests. This is a recurring problem that affects many users; from time to time zoho server is repeatedly asking for PW in a loop. It used to get resolved by zoho support, but this time they ignored my multiple requests for help. It's not happening with other providers. My zoho accounts are imap. Tried creating one with pop - not possible.

Any solution before i ditch zoho? Is there a list of free secure providers accessible to TB? I like Proton, but it charges for that...Thank you

Forums:

Thunderbird Portable

Indicator of incoming emails

Lazy F. — Sat, 20 Sep 2025 14:15:21 +0000

Bug? Thunderbird portable 143.0 32-Bit, Windows 10 Pro
I miss the indicator in the bottom left that shows the progress of incoming emails.

Forums:

Thunderbird Portable

WIN 11 Family - MOZGLUE.DLL - NAS -

rdepauw — Tue, 02 Sep 2025 16:32:20 +0000

Thunderbirdportable is stored on a NAS server

perfectly works on Win10

don't work with WIN 11 24H2 (error message like "mozglue.dd isn't made to run on windows... reinstall...error 0x0000428")

TB run on the same PC if TB folder is on local (c:)

any idea ?

Forums:

Thunderbird Portable

Thunderbird vers 142.0.0 is a x64 bit version??

ports4dje — Wed, 27 Aug 2025 18:52:28 +0000

I have big problems with my Thunderbird being stable. For more than ½-1 year almost, it crashes every single time eventually during mail checks. It works several minutes and pulls down emails (IMAPs) and then suddenly it crashes TB. It's a 32-bit version I use.
It checks many email addresses (20+) I use for different tasks.

Is there a x64 bit version also?
-could this be part of the problem why it crashes after a little time?

I used it before for many years without it crashing!

Any suggestions to what it can be??

TB portable: 140.2.0esr (32-bit)

My desktop PC:
CPU: Intel Core i7-6700 @ 3.40MHz
OS: Win10Pro (22H2) build: 19045.6216 (64-bit)
RAM: 32Gb (speed: 2666)
Graphics: Intel HD 530 (128Mb)

Forums:

Thunderbird Portable

[Fixed] Thunderbird Portable 141.0 English installer is just 1.2 MB

amitagarwal — Fri, 25 Jul 2025 16:25:09 +0000

It look like invalid file was uploaded for ThunderbirdPortable_141.0_English the file not have any exe
and giving error "Mozilla Thunderbird, Portable Edition cannot be started. You may wish to re-install to fix this issue. (ERROR: thunderbird.exe could not be found)"

Forums:

Thunderbird Portable

Tools>Export

noospam — Wed, 04 Jun 2025 21:39:13 +0000

Is Tools>Export meant to work for the portable version? I tried 3 times and zip files are successfully created. Howeverf I can't open the zip file because it says invalid.

I have the desktop version as well and that works fine.

Forums:

Thunderbird Portable

Direct update (Help->About) not working anymore

GoD — Fri, 16 May 2025 12:21:50 +0000

Since TB 128+- I have a problem with updating TB.
Before I didn't always waited for PA to release the new version.
I clicked on Help -> About and installed the update. After a restart of TB, I had the newest version.
Now, I can update, restart TB and I'm still running the old version.
I can repeat this 10 times and nothing changes.
When I look in to the app folder, there is an update folder where the new version is inside.
When I close TB and move this folder so overwrite the existing app, I have the new version running.
Why isn't it working anymore? Is it a change in the PA exe or a bug in TB?

Forums:

Thunderbird Portable

[Fixed] Unable to download latest Thunderbird 128 ESR

newprouser — Fri, 02 May 2025 03:34:13 +0000

Hi,

I tried downloading the latest Thunderbird 128 ESR, but got the below error:

Not Found

The requested URL was not found on this server.

Has the download been removed due to any issue ?

link removed by mod jth

Regards

Forums:

Thunderbird Portable

Unable to start thunderbird after update today 2 May 2025

noospam — Thu, 01 May 2025 21:46:04 +0000

Thunderbird portable have always been solid for me until this morning. I have always updated to newer versions when prompted and been good except this morning. The installation stalled and my laptop froze up. So I restarted my laptop and tried to run TB but I get these error messages. It did not load at all. Can't seemed to attach image here to show error messages. So error status is 0xc0000020 and "Couldn't load XPCOM".

Hoping to save it instead of having to reinstall because I have more than 40GB of emails. Its imap so emails are still with email hosting provider but will take ages to download agin.

Any help will be appreciated.

Forums:

Thunderbird Portable

Importing data into a Windows Thunderbird installation / Portable version as default mail program

xprt007 — Tue, 01 Apr 2025 11:47:24 +0000

Hi there
I have been using a portable version of Thunderbird, on partition D for a long time, but because I find no way of making it the default Windows mail program, a feature that I often need, I have installed a local version but having problems with importing the data from the portable version, because it is well over the 2GB, actually around 6GB, with many accounts, too cumbersome to setup anew, etc.
I see instructions for importing data into the portable version, but not the other way round.
- How EXACTLY do I go about this? Exacty which folders do I copy to where on the Windows 11 notebook and would that suffice to get to work on starting TB?
- In trying to make PortableThunderbird the default mail program, in settings, one it seems can only set a program installed in Windows & there is no option for a program that is portable or is there & if so any simple way to do so?

I would appreciate your guidance.

Thanks in advance.

Forums:

Thunderbird Portable

Can't drag and drop file attachments

coffent — Mon, 20 Jan 2025 22:00:49 +0000

Sometimes Thunderbird Portable will let me drag and drop files to be attached to a message, other times it will not. (This morning it would; this afternoon it won't.) Is there a fix for this?
Note added a day later: Now it's working again.

Forums:

Thunderbird Portable

Can't open attached files directly

coffent — Mon, 20 Jan 2025 15:57:41 +0000

When I try to open an attached file in an email message (say "Example.pdf") I get this error message, or something similar:

"An error occurred while opening a document from the file:
C:\Users\CHS2\AppData\Local\Temp\nsnD5B3.tmp\ContainedTemp\pid-20128\Example.pdf"

Based on ChatGPT, I tried adding a line like:

user_pref("browser.cache.disk.parent_directory", "D:\\cDat\\Programs\\TBird\\Temp");

but Thunderbird Portable overwrites the line if it's in prefs.js and ignores it if it's in user.js

Is this an inherent problem with Thunderbird Portable that can't be fixed?

Forums:

Thunderbird Portable