"HKEY_CURRENT_USER\Software\Google\GoogleDesktop\Preferences" create a DWORD value named "hot_key_flags". Setting this value to: - "0" disables both Ctrl-Alt-G and Windows-G - "1" disables Windows-G, but leaves Ctrl-Alt-G enabled - "2" disables Ctrl-Alt-G, but leaves Windows-G enabled - Removing the key or setting the value to "3" or higher will enable both keys.
You must restart GoogleDesktop for this change to take effect. Sorry for this inconvenience and thanks for your feedback.