How To Fix Microsoft Outlook Signature Window Not Opening

Do you have Microsoft Outlook 365 , 2016 or 2019? Did a recent Windows Update break the ability to open the signature window? Here are the steps to take to resolve that issue.

  1. Follow the path to Widows Settings>Default Apps>Apps and Features>
  2. Uninstall the Microsoft Office \ Outlook version you installed.
  3. Uninstall Microsoft Office Desktop Apps which is the default apps windows installs. 
  4. Open up Registry Editor as Administrator.
  5. Now lets make a backup of registry, Click File > Export and save this backup to the desktop.
  6. On your keyboard press CTRL + F to open the find window
  7. Search for the following and delete all keys containing: 0006F03A-0000-0000-C000-000000000046 
  8. Reboot Computer
  9. Grab your Microsoft Office \ Outlook Software and reinstall. 
  10. Configure your Outlook account.
  11. Go in your mail options and you should now be able to open the signatures window.


A malfunctioning signature window in Microsoft Outlook can be a frustrating experience. By following the troubleshooting solutions outlined in this article, you can resolve the issue and regain full functionality. Remember to repair the Outlook installation, disable conflicting add-ins, create a new Outlook profile if needed, and keep your software up to date. In case the problem persists, consider seeking further assistance from Microsoft support. With a functional signature window, you can personalize your emails and leave a lasting impression on your recipients.

I hope this article was helpful, if you have any questions, please feel free to contact me. If you would like to be notified of when I create a new post, you can subscribe to my blog alert.

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