Word document links won't open in IE 9

Question

I got a user who cannot open up a word document link in sharepoint online that should display a word  dialog box basically in IE 9. When clicking, nothing happens even if pop up blocker is off, but he can access the word documents from the link in Firefox. 
I also found out that I am able to open it up under my windows profile on that machine so it must be a corrupted windows profile.
I reset IE
Cleared cache
Verified in registry in class roots that .html is set to htmlfile
Anything I can do besides redoing the user's windows profile?
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Answer 1

Can you try Firefox Safe Mode to see if the problem goes away? You can restart in Firefox Safe Mode by either:
* Clicking the menu button [[Image:New Fx Menu]], click Help [[Image:Help-29]] and selecting ''Restart with Add-ons Disabled'', or;
* Holding the '''option''' key while starting Firefox.
If the issue is not present in Firefox Safe Mode your problem is probably caused by an extension, theme, or hardware acceleration.
Let us know how you get on.