Cannot install a Bluetooth device after you install Windows XP Service Pack 2

Method 1: Rename the Bth.inf file

Rename the %WINDIR%\inf\Bth.inf file to Bth.bak before you install or reinstall the third-party device or stack. When you rename the file, you prevent Windows Plug and Play PNP from using that INF file to install the Bluetooth driver that is included with Windows XP SP2. To rename the file, follow these steps:

1. Click Start, click Run, type %windir%\inf in the Open box, and then click OK.


2. Right-click Bth.inf, and then click Rename.


3. Rename Bth.inf to Bth.bak, and then press ENTER.


4. Install the third-party Bluetooth driver.

Method 2: Update the Bluetooth driver in Device Manager

To replace the Windows XP SP2 installation of the Bluetooth stack, update the driver in Device Manager. When you do this, specify your third-party driver. To update the driver in Device Manager, follow these steps:

1. Click Start, click Run, type devmgmt.msc in the Open box, and then click OK.


2. Locate the device.


3. Right-click the device, and then click Update Driver.


4. Follow the steps that appear on the screen in the Hardware Update Wizard to specify your third-party driver for the Bluetooth device.

 http://support.microsoft.com/default.aspx?scid=kb;en-us;840635

Cannot install a Bluetooth device after you install Windows XP Service Pack 2