InfoPath form opens in the browser instead of InfoPath Filler when a link is clicked from the Approval Task email

Question

I have an admin approved InfoPath 2010 form that is web enabled. It is published to a SharePoint 2010 Forms library and an Approval Workflow is attached to it.
The form needs to open up in the InfoPath Filler with the Workflow Task bar at the top so users can approve the task from within the form and not go to Tasks list to do so.
Here's a problem I am experiencing: sometimes the form opens in InfoPath Filler and sometiems it opens in the browser when the link to approve the form is clicked form the email that is sent by the workflow.
Windows 7, IE 9, MS Office 2010:
The form opens up in InfoPath filler like it supposed to. The Workflow task bar is there for users to approve the form.
Surface Pro with Windows 8.1, IE 11 and MS Office 2013
The form opens up in the browser and there is no Workflow task bar at the top.
Things that I've already looked at and tried which didn't solve the issue:
- The forms library is exclusivly set to open documents/forms in the Client Application
- Set the browser compatibility mode in IE 11, that doesn't work too well, because you have to do it every time you open the browser.
- Setting browser compatility in IE 11 reintroduced another issue, of multiple login promts, which was fixed by entering the SharePoint site in question into the Trusted sites by a group policy. Adding the site to trusted sites made the forms open up in the
browser.
- Researched compatibility issues with InfoPath and Windows 8.1, cannot find anything.
- Researched compatibility issues with InfoPath 2010, Windows 8.1 and SharePoint 2010, also didn't find anything.
Can someone offer a suggestion on how to fix this problem, preferably with no code, because we are not allowed to put custom code on the server?
I need to force InfoPath form to open in InfoPath Filler when the link to the form is clicked from the Workflow email. Also the login prompts should not pop up. Need it to work on all the platforms: Windows 7, and Surface Pro Windows 8.1.
Thank you.

Answer 1

Hi,
Thank you for your response.
[Steps about how to capture the capture the fiddler log]
===========================================
1. Download fiddler from
http://fiddler2.com/
2. Install fiddler and launch fiddler.
3. When the fiddler be launched, the log will be enabled automatically.
4. You can click “X” to remove all the records before you reproduce the issue.
5. If the web site has been configured to https. Please enable https option:
             Click “Tools” -> “Fiddler Options”            
Switch to HTTPS tab, then check “Capture HTTPS CONNECTs” and “Decrypt HTTPS traffic”.
6. Then repro the issue.
7. Click “File”->”Capture Traffic”, uncheck the Option “Capture Traffic” to make sure the “
” is not shown, that mean the logs has been stopped.
8. Click “File”->”Save” ->”All sessions”, save the file.
Any quesitons, please let me know.
Best Regards,
Dats Luo