Apparently there is a trick to changing the default shortcut for Windows Search. However, I'd like to change it to Ctrl+Ctrl (e.g. pressing Ctrl key twice, like Google Desktop does). Is there a way to pull this off?
I don't think it's possible using the registry key because the control key is a modifier, not an ASCII character.
I'd use something like AutoHotKey to do this. The following script would do this in AutoHotKey (assuming the default key combo is Control+Shift+f):