My experience...I own a Inspiron E1505, and recently purchased a dell 350 bluetooth adapter card. I eagerly opened the box and read the instructions which explicitly state:
1. After installing the device, turn on the computer.
2. If the Found New Hardware wizard pops up, cancel it and proceed to the "Installing the Software" Section (it then tells you to insert the given CD and follow the install).
After I turned on the computer, no wizard came up. Windows automatically found and installed the card, but stupidly, I quickly went into Device Manager and uninstalled any drivers that windows had installed, which were neatly folded into a "bluetooth radios" branch in the devmanager.
I popped in the CD and installed, and like stated before, got stuck at 56%. It would ask me to press Fn+F2 to turn on the bluetooth (even though the blue light was in fact on at the time) and when I would, it wouldn't do anything. I even left it for four hours and came back to 56%. I finally pressed "cancel" when it asked me to turn on the Fn+F2, and it cancelled out of the second install window and the install completed, according to the primary install window. but, there was not a trace of anything resembling Bluetooth in the device manager, and the bluetooth util that somehow appeared in my control panel didn't see any adapters installed. I couldn't find any drivers or programs that were installed that could run this magic bluetooth util, or figure out how to get rid of it.
I tried manually telling windows to find a bluetooth device using Add Hardware wizard, but it didnt work and when i tried to disable/uninstall it my device manager would lock up. I eventually had to erase the driver files manually via what it told me in the driver properties, while in safe mode.
At this point, there are no traces of bluetooth installed on the computer in the device manager, the blue light is on, and I cannot get Windows to see the bluetooth card.... I don't know how that is even possible.
The only difference from the driver in the CD and the one I DLed from Dell is that the Dell one keeps asking for me to press Fn+F2 every five minutes while the CD only asks once.
The only thing I see in the DevMan that rings a bell is this device that is listed under the USB controllers: "DELL U2 - CSR Driver" that automatically reinstalls via Windows when I uninstall it.....
I'm not sure what to do at this point other than to backup my sh!t and reinstalling MCE. I am trying to figure out if it is that important or not at this point.