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Cannot install a Bluetooth device after you install Windows XP Service Pack 2
Article ID: 840635
After you install Microsoft Windows XP Service Pack 2 (SP2), you experience the following symptoms:
This issue may occur if the following conditions are true:
To work around this issue and to successfully install the third-party driver for your Bluetooth adapter, use one of the methods that is described in the following sections.
Method 1: Rename the Bth.inf fileRename 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:
Method 2: Update the Bluetooth driver in Device ManagerTo 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:
When you install Windows XP SP2 on a computer where the third-party Bluetooth adapter driver is already installed, Windows XP SP2 does not overwrite that driver. The exception to this behavior is when you perform a slipstreamed upgrade of Windows XP SP2. However, if you install Windows on a computer where the third-party driver is not installed, or if you perform a slipstreamed upgrade, Windows installs the driver that is included with Windows XP SP2 for the Bluetooth adapter.
When you try to install a third-party driver, you are unsuccessful because the Windows XP driver for the Bluetooth adapter is signed. Because the Windows XP SP2 version of this driver is signed, Windows ranks it higher in the Plug and Play scheme than an unsigned driver or a third-party signed driver.