Outlook 2007 Blocking Links

What browser are you using?

Follow this link and do the 'Let me fix it myself' part.
http://support.microsoft.com/kb/310049

Method 1: Reset Internet Explorer settings
You may be able to resolve the issue by resetting Internet Explorer web settings. To do this, follow the steps that correspond to your version of Internet Explorer.

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. elect 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.

Internet Explorer 6

1. Start Internet Explorer.
2. On the Tools menu, click Internet Options.
3. Click the Programs tab, and then click Reset Web Settings.
4. Under Internet programs, make sure that the correct email program is selected.
5. elect the Internet Explorer should check to see whether it is the default browser check box.
6. Click Apply, and then click OK.
   
   Note You may receive the following message when Internet Explorer starts: Internet Explorer is not currently your default browser. Would you like to make it your default browser?
   
   If you receive this message, click Yes.

Thanks for posting back.

Glad you could solve your problem.