Windows 7 finds the Mini 9's Bluetooth all on it's own, no additional drivers are needed.
If you loaded the Wireless Switch utility Fn-2 (not F2) should display a dialog box that will turn on the Wifi on and off in different combinations.
The Device Manager should show Bluetooth Radios as a subsection with two devices underneath. If the radio is powered off they disappear from Device Manager.
Dell's Wireless Switch Utility installer for the Mini 9 is R192570.exe (I don't have a URL for it, but you can search here for it, I know it's been mentioned in several posts.)