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. I only heard about the device plugging. Humming.
Small 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 unknown device:
This reception It was used on this computer a few months ago, there should be no problem, and Windows 8 support for Bluetooth is certainly good, even if there is no built-in driver, after connecting to the Internet, you can also update via Windows. The website gets extra drivers. Why is there a problem that the driver cannot be installed automatically?
Double-click on the device and a strange prompt is displayed in the properties window that opens ——“reject access”:
click“ Update the driver …”, try to find and install the driver through Windows Update, and even have the same prompt:
This is a new feature of the Windows 8 Device Manager, which is in the device properties. System events related to the device can be viewed directly:
For most of the time, this event log list can help us to determine exactly when the device is installed, driver files, installation results and more. But after analyzing it here, and there are very valuable clues.
Similarly, "Reject access" has been encountered before, generally because the registry location that needs to be written during the driver installation cannot be written. Of course, there are no other possibilities.
First of all, start from the most likely place, the registry. So how do you determine where the registry entries can't be written?
At this point, don't forget that 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 value 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.