FIX: Unable to Open Links in Mail app or Outlook in Windows 10.

In recent years many times I have encountered the following issue in Windows 10: Suddenly and for no apparent reason, email hyperlinks in Windows 10 Mail app or Outlook 2013, 2016, 2019 and Office 365, do not open in the web browser with several errors. The problem usually occurs after a Windows 10 update and only if the user uses Firefox or Chrome as the default web browser and not with Microsoft Edge.

If you unable to open links in Outlook, Windows email, Thunderbird or from any other program in Windows 10, continue reading below to fix the problem.

This tutorial contains instructions to fix the following errors when trying to open links from emails or other applications in Windows 10.

• Unable to open html links/files.hyperlinks in Windows 10.
• Your organization's policies are preventing us from completing this action for use. For more info contact your help desk.
• This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator

FIX: Cannot open HTML links from Email or other Programs in Windows 10.

Method 1. FIX HTML File Associations in Registry.

If you cannot open html links on Windows 10 Mail, Outlook or other apps, proceed and add the missing associations for the HTML links in Registry as instructed below:

1. Open Command Prompt as Administrator. To do that:

1. 1. In the Search box type: cmd (or command prompt).
   2. Right click on the command prompt (result) and select Run as Administrator.

2. In command prompt give the following commands, in order (press Enter after each command):

• REG ADD HKEY_CURRENT_USER\Software\Classes\.htm /ve /d htmlfile /f
• REG ADD HKEY_CURRENT_USER\Software\Classes\.html /ve /d htmlfile /f
• REG ADD HKEY_CURRENT_USER\Software\Classes\.shtml /ve /d htmlfile /f
• REG ADD HKEY_CURRENT_USER\Software\Classes\.xht /ve /d htmlfile /f
• REG ADD HKEY_CURRENT_USER\Software\Classes\.xhtml /ve /d htmlfile /f

3. Restart your PC and try to open hyperlinks again.

Method 2. Set Microsoft Edge as the Default WEB Browser.

Since the "HTML links won't open" issue, faced only when using Firefox or Chrome as the default browser, proceed and set the Microsoft Edge as the default browser. To do that:

1. Close your email application. (e.g. Outlook, Windows Mail, Thunderbird).

2. Navigate to to Start menu , click Settings and then click Apps.

3. Select Default Apps and then at Web Browser click on the current browser and select the Microsoft Edge as the default web browser.

4. Open your email program and try to open a link.

That’s it! Let me know if this guide has helped you by leaving your comment about your experience. Please like and share this guide to help others.