Windows 10: open a graphic file attached to an email received by Thunderbird 52.4

Hi,
on a newly setup Windows 10 pro x64 v1709 I've set XnView as standard app for all graphic files supported by that program. That works absolutely fine when doupleclicking such a file in Windows explorer.
But: when I receive an email with attached graphic file(s) and I click on it to view it in XnView then first opens Thunderbird's dialog box asking me if I want to open or to save the file. Selecting open and clicking ok should open the file in XnView. But unfortunately ALWAYS opens Windows' dialog where I have to select or to confirm the program to open the file. Although when I select "always use this program" the next time I have the same "trouble".
On my second PC with a very very similar installation of Windows all this works fine.-

For me it looks like Windows does not store correctly that it has to open graphic files ALWAYS (i.e. if doubleclicked in the explorer or selected in Thunderbird to be opened) with XnView. But where I can find the wrong setting and how can I fix it?

Does someone know where in the registry Windows 10 stores that e.g. .jpg or .tif or .bmp have to be opened by XnView WITHOUT SHOWING ME THE SELECTION DIALOG ??

1000 thanks in advance for your kind help and please excuse my poor English.

Kind regards,
Peter

:)

 

Within the last hour Win 10 has become useless for email.

This morning I could send and receive emails with attachments with zero problems.

Outlook then started giving me an error while attaching files "You don't have permission to perform this operation" while adding attachments.

1) I'm the administrator on this machine.

2) I have full read write permissions on all files involved.

Then Outlook stopped sending selected emails. Some emails would go others would not.

No error for that.

Since Outlook started being a pain in the you know what I switched to Thunderbird, you know to GET WORK DONE Outlook decided not to let me do.

Thunderbird, unlike Outlook would attach the VERY SAME files Outlook would not.

However it gave me a Sending of the message failed.

Unable to open the temporary file C:[file path] Check your 'Temporary Directory' setting. Which when I investigate is a WINDOWS issue.

Any ideas how within an hour Windows 10 could completely **** up sending, receiving emails and sending attachments.

I've restarted and run disk chk.

Right now work wise Windows is brick and costing money.

 

File Explorer Share via Email

I was using Mozilla Thunderbird as my default email app. When I was in File Explorer, I could select a file or files, click the "Share" button, a menu would drop down, I clicked the "Email" icon, and Thunderbird would open, with a new email drafted, with
the selected files attached.

I started playing with the Mail app that is included in Windows 10 yesterday, and I really like it. So I decided to make it my new default email. I uninstalled Thunderbird, set Mail as default, but when I try to send attachments via email from the File
Explorer, the "Email" icon is grayed out.

How can I get this function to work with Mail?

Thanks!

 

Did you try within Thunderbird ? Under Tools/Options/Attachments, hit the drop down menu under Action/select 'Use other' will take you to dialogue where you can browse for app. Not sure how to add file types though. Good Luck

 

In Thunderbird all works well. But ALL users on that PC have the same problem which MUST be in Windows and NOT in Thunderbird.

THEREFORE PLEASE move this thread back to general support. I don't expect help here in browsers and email!

Thank you.

Peter