Outlook links open in IE only if the browser is open

Question

I've specifically set my default browser to Chrome and for Outlook links to open in Chrome yet whenever I have Internet Explorer open, it seems to throw all your settings out the window and open links in IE by default (and I unfortunately have to use IE from time to time for bug testing/fixing - of course, why else).

Can I prevent this from happening so that Outlook still opens links in emails with my default browser if IE is open?

Using Windows 7 OS, Outlook 2013, IE v11 and Chrome v32.

Solution

I had to also change the default program associated with .mht and .mhtml files.

Control Panel\Default Programs\Associate a file type with a specific program

Comments

[and31415]

Click on Start, type default programs in the search box and press Enter. Once there, click Set your default programs and locate Google Chrome on the list. Make sure it "has all its defaults."