Clicked a link in Outlook, but nothing happened

https://support.microsoft.com/en-us/kb/310049

Let me fix it myself

Important Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

To resolve this problem, follow these methods in order. Check whether the problem is resolved after each method.

Method 1: Reset Internet Explorer settings

Internet Explorer 11 and Internet Explorer 10

Warning If you are using Windows 10, Windows 8.1 or Windows 8, please proceed to method 2.

1. Start Internet Explorer.
2. Click the Tools icon, and then click Internet Options.
3. Click the Advanced tab, and then click Reset. 
   
4. In the Reset Internet Explorer Settings window, select the Delete personal settings check box, and then click Reset. 
   
5. Click Close when it is completed. 
   
6. Close and restart Internet Explorer.
7. Click the Tools icon, and then click Internet Options.
8. Click the Programs tab, and then click Set programs. 
   
9. Click Set your default programs. 
   
10. In the Programs list, click Microsoft Outlook, and then click Set this program as default. 
    
11. Scroll back up to the top of the default programs list and highlight Internet Explorer and click Set this program as default. 
    
12. Click OK, and close the Default Programs dialog box.

Internet Explorer 9

1. Start Internet Explorer.
2. Click the Tools icon, and then click Internet Options.
3. Click the Advanced tab, and then click Reset. 
   
4. In the Reset Internet Explorer Settings window, select the Delete personal settings check box, and then click Reset. 
   
5. Click Close when it is completed. 
   
6. Restart Internet Explorer.
7. Click the Tools icon, and then click Internet Options.
8. Click the Programs tab, and then click Set programs. 
   
9. Click Set your default programs. 
   
10. In the Programs list, click Microsoft Outlook, and then click Set this program as default.
11. Click OK, and then close the Default Programs dialog box.
12. In the Internet Options dialog box, click the Programs tab, and then click Make default under Default web browser. 
    
13. Click OK.

Internet Explorer 8 and Internet Explorer 7

1. Start Internet Explorer.
2. On the Tools menu, click Internet Options.
3. Click the Advanced tab, and then click Reset.
4. Click the Programs tab, and then click Set programs.
5. Click Set Default Programs.
6. Select Microsoft Outlook, and then click Set this program as default.
7. Click OK, and then close the Default Programs dialog box.
8. In the Internet Options dialog box, click the Programs tab, and then click Make default under Default web browser.
9. Click OK.