The Windows 10 Mobile Insider Preview is just that – an unfinished, possibly unstable preview of the latest iteration of Windows 10 Mobile. The Windows 10 Mobile Insider Preview is not meant to be a complete and final version of the firmware that is represents, which is why Windows Insiders may face one or more of a plethora of different issues when they decide to join the Insider Program and upgrade to the Insider Preview. One of the problems that a Windows Insider stands to suffer from is error code 0xA00F4246 (0xC00D36B6) – an error code that shows up when they try to open any application that has to do with their camera, an application such as the default Camera app or Windows Camera, and causes the app to crash.
Not being able to use their camera can be quite unsettling and agitating for the average Windows Insider, especially if the phone that they upgraded to the Windows 10 Mobile Insider Preview is their primary phone. Well, if you are suffering from error code 0xA00F4246 (0xC00D36B6) and are not able to use your camera through applications such as Windows Camera, the following are the three solutions that you can try and use to fix the issue:
Solution 1: Perform a Hard Reset
Hold down the Volume Down button, and while doing so, quickly press and release the Power This will make the device vibrate.
Release the Volume Down button when an exclamation mark appears on the screen.
Press the following hardware buttons one at a time in the exact same order they are listed in:
Volume Up > Volume Down > Power > Volume Down
The device will then vibrate, reboot, show the Nokia flash screen and then go to the spinning gears install screen. Once the spinning gears process completes, the device will be reset and you should now be able to use your device’s camera through the default Camera app (or any other camera app, for that matter).
Solution 2: Roll back to a version of Windows Mobile that the camera worked on
If a Hard Reset does not fix error code 0xA00F4246 (0xC00D36B6) on your device, your only remaining option is to roll back to a previous version of Windows Mobile – a version on which the camera worked on all applications, including Windows Camera. Rolling back to a previous version of Windows Mobile may wipe some or all of your personal files and data, so be sure to backup anything that is of value. To do so, you need a Windows computer and a USB cable which can be used to connect your phone to your computer, and you need to:
Go here to download the Windows Phone Recovery Tool (designed for Lumia phones running on Windows 8 or higher). If you have an older Lumia device or other Nokia phone, you will have to go here to download the Lumia Software Recovery Tool.
Install the recovery tool on your computer.
Open the recovery tool.
Connect your phone to the computer via the USB cable. Wait for your phone to be detected automatically. If your phone is not automatically detected, click on the “My phone was not detected” button and follow the onscreen instructions.
Once your phone has been detected, select your phone’s model in the Recovery Tool window.
The next screen will contain all of the available Operating System versions for your phone. Select the version that you want to roll back to (the one on which your phone’s camera worked perfectly) and click on Reinstall software.
Click on Continue on the next screen.
The files required for the installation of your selected firmware will definitely be larger than 1 Gigabyte, so you will have to patiently wait for the firmware to be downloaded and then installed on your phone, making sure that the USB connection between your computer and phone stays secure throughout the process.
Once the installation of your selected firmware has been completed, you will receive a success message stating “Operation successfully completed”. You are free to restart your device after this message appears.
Solution 3: Wait for a new firmware update
If you upgraded to a specific version of the Windows 10 Mobile Insider Preview and are unable to use your camera due to error code 0xA00F4246 (0xC00D36B6), chances are that you are not alone and that Windows is already aware of the issue. Since that may be the case, if you can bear with the idea of not being able to use your device’s camera for a couple of weeks or so, you can choose to simply stay on the Windows 10 Mobile Insider Preview and wait for the next firmware update to the Insider Preview. Hopefully, the next firmware update will fix the issues you are facing with your device’s camera and error code 0xA00F4246 (0xC00D36B6) on the Windows 10 Mobile Insider Preview.