Google Integration
This setting tells Google Desktop to search your computer files every time you do a Web search using Google's online search engine. Your desktop results are shown with Web search results, however, your personal search results are not shared with Google or anyone else.
This feature is turned on by default. To turn it off, click the check box.
Keyboard Hotkey
This lets you set a keyboard shortcut so you don't have to take your hands off the keyboard to perform a search. The default hotkey is CTRL + CTRL, but you can change this by selecting Change Hotkey. A pop up will open. Click in the text box.
The text will change to Press new hotkey.
Use your keyboard to select your desired key combination.
Press OK.