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My Latitude E6530 has a "Calc" hotkey which launches calc.exe by default. I have no need for this application; how can I change it?

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I found the answer to this question in another forum ( The solution, which worked for me, is to edit HKLM/Software/Microsoft/Windows/CurrentVersion/Explorer/AppKey/18/ShellExecute. The change was immediate, no need to log cycle.

I presume that the other elements within AppKey are also editable; if anyone else verifies this please edit it into this answer.

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