title: Default Excel keyboard shortcut CTRL + ALT + F5 no longer works
body: <p>The <em>Microsoft Excel</em> keyboard shortcut <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>F5</kbd> to Refresh All was one of my favorites until it stopped working.  Presently, when I enter that key combination nothing (as far as I can see) happens.  I've had to live without it for so long that I can't recall if there was anything specific that was changed prior to it no longer working. <kbd>Alt</kbd>+<kbd>F5</kbd> continues to work to Refresh a specific PivotTable, but that has limited value.</p>
  
  <p>The version is <em>Excel 2007</em>.</p>
  
  <p>How can I discover what is preventing <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>F5</kbd> from working and restore its default functionality?</p>