Win8 installs the Bluetooth driver to encounter the "access denied" problem solution

Recently, I plan to use a Bluetooth mouse on a desktop computer with Windows 8, so I plugged the mini-Bluetooth receiver sent by the company into the USB interface. I thought it would be ready to use, but I didn’t react for a long time. The hum of the pull.

Tip: If the following pictures are not clear, you can click on the picture to enlarge!

Open the device manager and find that the Bluetooth receiver driver does not hit at all. It is displayed as an unknown device:

This receiver was used on this computer a few months ago, there should be no problem, and Windows 8 support for Bluetooth is definitely good, even if there is no built-in driver, after connecting to the Internet You can also get additional drivers through the Windows Update website. Why is there a problem with the driver not being installed automatically?

Double-clicking on the device displays a strange prompt ——“rejected access”:

Click “Update Drivers …”, try to find and install drivers through Windows Update, and there are the same tips:

Here is a new feature of Windows 8 Device Manager, which is System events related to the device can be directly viewed in the device properties:

For most of the time, this event log list can help us to determine the details of the device installation time, driver files, installation results, etc. . But after analyzing it here, and there are very valuable clues.

A similar "rejection" problem has actually been encountered before, usually because the registry location that needs to be written during the driver installation cannot be written. Of course, there are no other possibilities.

First, check the registry from the most likely place. So how do you determine where the registry entries can't be written?

Don't forget this time, in addition to the event log, many features in Windows will also log log files, through which you may find more useful Information.

In Windows, the log files for installing device drivers are primarily the setupapi.dev.log file in the WindowsInf folder. So, I found this file in the system, slowly looking back from the back, and finally saw some valuable content:

This part has a lot of records of Access is denied, the record shows that it is written HKRParametersRestrictionsCOD Major 05 Minor 10DontAddIncomingSPPInWizard This registry entry failed to install due to a denial of access.

At this point, the main reason for the problem should be found. The next step is to solve the problem and verify the guess.

Open the Registry Editor and get ready to start looking for the registry key above. But which primary key does HKR mean? It doesn't matter, we can search for “Restrictions” or “COD Major 05 Minor 10” by searching for the exact location.

Sure enough, find the corresponding key in the registry. Because, from the name of the parent registry item "BTHPORT" (Bluetooth port), this item is indeed related to Bluetooth:

What needs to be explained here is that I still use the registry editor. The software is not a built-in regedit, but a more powerful Registry Workshop. The power of it is not listed here, just pay attention to the red fonts in the above figure, such a mark in the Registry Workshop indicates that these registry keys are not accessible to the current user.