The article explains why hyperlinks may not be working in Outlook and provides several solutions to fix the issue. These methods will let you open links in your Outlook emails again with no problem, no matter which version you use - Outlook 2013, 2010, 2007 or lower.

Just imagine this... You have always opened links in Outlook just fine, and then all of a sudden hyperlinks stopped working and whenever you click on a link embedded in an email, you end up getting the error. In Outlook 2010 or 2007, the error message is as follows:

This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator.

If you have Outlook 2013, the message is different though its meaning is as vague and unclear as before:

Your organization's policies are preventing us from completing this action for you. For more info, please contact your help desk.

Another possible error is this: General failure. The URL was: http://www.some-url.com. The system cannot find the file specified.

Why cannot I open links in Outlook any longer?

The main reason of hyperlinks not working in Outlook is the default internet browser not registered (properly) in your operating system. Typically, this issue comes up after uninstalling Google Chrome or changing the default browser from Internet Explorer to either Chrome or Firefox.

Mind you, the default browser might be changed even without your notice by some misbehaving add-in or application that installs Chrome / Firefox along with its own files and makes it the default Internet browser unless you remove the tick from the corresponding checkbox.

And naturally, that option is not very noticeable, so anyone can easily overlook it during installation. An evident example of such programs is Adobe Flash Player that may install Chrome both during the first installation and updates, so be sure to uncheck that option on the next update to avoid the problem with hyperlinks in your Outlook.

Well, this is the most typical cause, though Outlook links may stop working in some other scenarios and even without any obvious reason at all. Okay, know that you know the cause and consequences, let's see how you can get the problem resolved.

How to fix hyperlinks not working in Outlook

We will start with the easiest troubleshooting steps that take the least time and effort, so it makes sense to follow the below methods in order and after trying each solution check whether you can open links in Outlook again. These solutions work for all versions of Microsoft Outlook 2013, 2010, 2007 and 2003.

Set Internet Explorer and Outlook as default programs

On Windows 7, you can set the default programs by going to the Control Panel > Default Programs > click Set your default programs.

Choose Internet Explorer in the Programs list and click the Set this program as default link.

Find Microsoft Outlook in the Programs list and set it as default too.

On Windows XP, you can do the same by going to Control Panel > Add and Remove Programs > Default Programs > Set your default programs.

An alternative way to access the "Set your default programs" dialog is by clicking Internet Explorer's Tools icon > Internet Options > Programs tab > Set programs.

Restart Outlook and check whether hyperlinks are working. If they fail to open again, proceed to the next method.

Reinstall Chrome or Firefox

If links stopped working in your Outlook after you had uninstalled Google Chrome (or Firefox) while it was set as your default browser, try setting IE as default before uninstalling another browser to prevent the problem. Here is what you do:

Reinstall Chrome or Firefox, whichever was set as your default browser earlier. The download links along with the detailed instructions are available here:

• Download Google Chrome
• Download Firefox

Set Chrome / Firefox as the default browser and check if hyperlinks work in your Outlook.

If you can open Outlook links now, then you can safely set Internet Explorer as the default browser. To do this, open Internet Explorer and click the Tools icon > Internet options.

Then navigate to the Programs tab, and click the Make default button. Click OK and close Internet Explorer.

Uninstall Google Chrome or Firefox if you do not need them any longer, and hopefully you won't have any problems with links in your Outlook ever again.

Note: Before changing the default browser, close Chrome / Firefox and make sure that no chrome.exe or firefox.exe process is running in Task Manager when you set IE as the default browser. To open the Task Manager, either press Ctrl+Shift+Esc or right click the taskbar and choose "Start Task Manager".

Edit the registry manually

If hyperlinks in your Outlook do not work any longer after you've uninstalled Chrome, Firefox or any other application (e.g. HTML web editors) that open HTML files by default, changing the HTM/HTML/XHTML associations in the registry may help.

Please be very careful when making changes in the system registry. If you are working in a corporate environment, it might be a good idea to ask your system administrator or IT person for assistance.

Anyway, before modifying the registry, be sure to create a system restore point and backup your registry completely, just to be on the safe side.

Now that you have taken the necessary precautions, you are ready to proceed to making the changes.

On Windows 7 and Windows 8, click the Start button, type Regedit and hit Enter to open the Registry Editor. On Windows XP, click Start > Run and then type Regedit in the Open box.

The Registry Editor will open, and you browse to HKEY_CURRENT_USER\Software\Classes\.html. Verify that the Default value of this key is htmlfile.

If the Default value is ChromeHTML or FireFoxHTML (depending on which browser you have installed), right click it and select Modify...

Change the Default value to htmlfile.

Repeat previous steps for .htm and .shtml keys.

Restart your computer for the changes to take effect.

The alternative way to make the same registry changes is to click the Start button and type the below command directly in the search line on Win 7 or Win 8. If you have an earlier Windows version, click Start > Run and then enter the command in the Open box.

REG ADD HKEY_CURRENT_USER\Software\Classes\.htm /ve /d htmlfile /f

Then enter a similar command for .htm and .shtml keys.

Reset Internet Explorer settings

If the problem with links in your Outlook persists, try to reset Internet Explorer settings.

1. Verify that your Outlook is closed.
2. Start Internet Explorer, click the Tools icon Internet Explorer Tools icon and choose Internet Options.
3. Switch to the Advanced tab and click the Reset button (if you use Internet Explorer 6 or lower, you'll find this option on the Programs tab).

The Reset Internet Explorer Settings window will open and you select the Delete personal settings checkbox, then click Reset.

Click the Close button when the resetting process is completed.

Be sure to set Internet Explorer and Outlook as default programs, as we discussed earlier in this article.

Close and then open Internet Explorer anew and after that check whether hyperlinks are working again in your Outlook emails, tasks and other items.

Note: If you receive a message on Internet Explorer start prompting you to make IE your default internet browser, click Yes. If you prefer a different browser, you will be able to choose it as default later.

Import a registry key from another computer

If recently you have upgraded to a newer version of Internet Explorer, the following registry key may be corrupted or missing:

HKEY_Local_Machine\Software\Classes\htmlfile\shell\open\command

You can fix this by importing it from another healthy computer to the affected machine.

Note: You will need to have the administrator rights to be able to import the registry file. Also, please be very careful when performing this operation. If you make just one tiny mistake when importing the key manually, e.g. copy it from / to a wrong registry branch, you may have very serious problems on your computer. If this worst scenario happens, be sure to create a system restore point first, so that you will be safe anyway.

Okay, now that I've given a word of caution and you heard it (hopefully : ), head over to another computer where Outlook links work just fine and do the following:

Export the registry key from the computer that doesn't have any problems with links in Outlook. Open the Registry Editor. As you remember, you need to click the Start button, type regedit and then press Enter. Find the following registry key:

HKEY_LOCAL_MACHINE\Software\Classes\htmlfile\shell\open\command

Right click the command subkey and select Export from the context menu.

Alternatively, on Windows 7 or Windows 8 you can switch to the File menu, and click Export... there. In earlier operating systems, the Export option may reside on the Registry menu.

Type a file name that is easy for you to remember, e.g. "Exported key" and save the registry branch to some folder.

Close Registry Editor.

Import the registry key to the problem computer.

This step is probably the easiest one we've performed today. Simply copy the exported registry key to the desktop (or any folder) on the affected computer, and then double-click the .reg file.

Make sure the Default value of the HKEY_CLASSES_ROOT \.html key is htmlfile

To check this, click the Start button again, type regedit to open the Registry Editor, and then navigate to the HKEY_CLASSES_ROOT \.html key. We've done this operations several times today, so we believe by now you are able to do this standing on your head :-).

If the Default value of this registry key is other than htmlfile, modify it as discussed earlier.

Do a system restore

System restore is a way to undo the resent changes in your computer's system in order to restore it to an earlier point in time.

You can open System Restore by clicking the Start button and typing System Restore in the search field. Then click Enter or wait a bit and choose System Restore from the list of results.‌

In the System Restore dialog window, you can either go with the Recommended restore option or "Choose a different restore point" when you know for sure that everything worked fine, including hyperlinks in Outlook.

And this is all we have to say on this problem. If hyperlinks in your Outlook emails still are not working, drop us a line in comments and we will try to figure out the cause.