We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

The default application for opening attachments (TWINUI) has disappeared. Help!

  • 3 replies
  • 1 has this problem
  • 10 views
  • Last reply by sfhowes

cydfra
cydfra
more options

I've always been able to open attachments I receive with no problem until just a few days ago. Suddenly, my options for opening anything other than a PDF have narrowed to 5 options, none of which work. The option for the default application (TWINUI) has disappeared except for attachments that are PDF's. I haven't been able to open any other types of attachments including DOCX and DOC. This is really causing problems in my work. Any help is appreciated! I'm using Windows 10. The 5 options that show for attachments are: Internet Explorer, Notepad, Microsoft Office 2010, Windows Media Player, and Windows Wordpad Application. As I said, none of these work.

I've always been able to open attachments I receive with no problem until just a few days ago. Suddenly, my options for opening anything other than a PDF have narrowed to 5 options, none of which work. The option for the default application (TWINUI) has disappeared except for attachments that are PDF's. I haven't been able to open any other types of attachments including DOCX and DOC. This is really causing problems in my work. Any help is appreciated! I'm using Windows 10. The 5 options that show for attachments are: Internet Explorer, Notepad, Microsoft Office 2010, Windows Media Player, and Windows Wordpad Application. As I said, none of these work.

Modified by cydfra

All Replies (3)

Matt
Matt
  • Moderator
  • Top 10 Contributor
more options

I think you may well find your Windows installation has issues. See here https://www.ctrl.blog/entry/what-is-twinui.html

cydfra
cydfra Question owner
more options

Thank you for the link. It looks like I might need to "restore the registry from a backup before the corruption occurred", however I have no idea how to do that. Would you be willing to tell me? Thank you.

sfhowes
sfhowes
  • Top 10 Contributor
more options

When you open an attachment from within TB, click the drop-down and select Other..., and if the opening app isn't listed, click Browse... and select the exe that opens the file type, e.g. winword.exe for doc and docx files. See picture.