Ctrl + Alt + F5 Not Working
The keyboard shortcut to Refresh All in Excel is
This refreshes all the data connections in the file in one step.
The problem is that on some systems (like mine) this conflicts with an Intel Graphics hot key.
To turn off the graphics hotkeys right click the Desktop and choose Graphics Options, then Hot Keys then Disable. See below.
Big thanks to StackOverflow for covering this issue – link below.