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I have the following problem using matlab on Windows 7.

When I double-click a .mat file matlab starts and loads the double-clicked file. Double-Clicking further .mat files opens them also in matlab. So far so good...

On the ohter hand, when I start matlab manually by clicking its Icon on the desktop, I get an "User Account Control" alert asking me if I "want to allow the following program from an unkown publisher to make changes to this computer".

The problem is that a double-click on a .mat file opens another instance of matlab. The running matlab is for some reason not recognized. Does anyone know how to fix this behaviour?

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The simple solution is to open the file by hand from within the application. My guess is your using a version not designed to support Windows 7. Here is a good question on that subject: superuser.com/questions/194806/… –  Ramhound Feb 25 '13 at 12:56
    
Of course this simple solution works. But I was asking for a solution to this annoying UAC issue. I forget to mention that I use matlab R2011b as all people in our department do without this kind of problem. –  user1618022 Feb 25 '13 at 15:38
    
If other people are not having this problem then its a problem with your system's configuration. Until you verify your configuration is correct, not much else we can suggest, if opening the file within the application isn't an acceptable solution. –  Ramhound Feb 25 '13 at 15:59
    
That's what I was asking for: What is the problem with my system configuration? –  user1618022 Feb 26 '13 at 6:22
    
Thats a better question for your IT staff. Of course I doubt this problem doesn't exist on your peer's computers also. –  Ramhound Feb 26 '13 at 12:21

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