We have had some customers report that after installing the DW375 & 380 Bluetooth Module drivers, the Bluetooth discovery is automatically enabled. This is something that will be addressed in a future driver update, but we do currently have potential workarounds for the DW375 issue to combat this.
For the DW375 module, the problem is with A04 revision of the driver and for the DW380 module, both A00 and A01 revisions of the driver are affected. This issue primarily affects Windows operating systems and both 32-bit and 64-bit operating systems are affected.
Possible workaround for the DW375 module issue:
Use the Windows native Bluetooth driver firstly and then perform a clean driver uninstall: to do this, go to the Device Manager (Control Panel > System > Device Manager - in the case of Windows XP, search in the Hardware tab and then Device Manager) and then search for any Bluetooth devices listed. Once you have found any entries labelled with Bluetooth, right-click on them and select Uninstall and follow all on-screen instructions.
After this, go to the Drivers and Download section of our support site (http://support.dell.com), select your system type and operating system type and then download the A02 version of the driver (file name: NIC_DRVR_WIN_R254689.exe). Once this has downloaded, run the file and follow all on-screen instructions to install this Bluetooth driver revision.
Next, download the A04 revision from the support site (file name: NIC_DRVR_WIN_R285455.exe) and then install this revision.
If the above does not resolve the problem, editing two Registry entries may help with this issue. However, please read the disclaimer below and if you are in any doubt about editing the registry, please do not follow the steps below.
CAUTION: The following procedure contains information about editing the Windows registry. Dell does not guarantee success or support these actions. Any use of the information provided herein, is performed at your own risk. You should make a backup copy of the registry files prior to executing any of the following steps. Incorrect use of the registry editor and editing the registry files can cause serious problems that may require a complete reinstall of your operating system. Dell assumes no responsibility, expressed or implied, regarding the consequences of any action taken as a result of the information provided herein:
Go to the Windows Start Menu and for Windows Vista and Windows 7, type in regedit into the search box then click on the regedit icon. For Windows XP, click Run and then type in regedit.
First, back up your registry in case of any problems. To do this, in regedit, click on Computer and then on the File menu and then Export. Export your Registry file to an easily accessible location and make a note of where you have stored this.
Using the Registry tree, navigate to the following entries:
[HKEY_CURRENT_USER\Software\Widcomm\BTConfig\Filters] then set "AllowOthersToDiscover" to 00000000 (to do this, right click on "AllowOthersToDiscover" and click Modify. In the dialog box, enter 00000000 in the Value data box then click OK.
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_413C&PID_8187\70F1A15170CA\Device Parameters] then set "Write Scan Enable" to 00000002.
Both of these entries are should have type REG_DWORD.
Dell will release new driver versions for both cards which contain a fix for this problem. DW375 A05 will be available shortly whereas DW380 A02 release is planned for Jan 2013.