I am trying to deploy a Windows 10 app to a Lumia 635 running 10.0.10586.11 and I get this error:
Error : DEP6100 : The following unexpected error occurred during bootstrapping stage 'Connecting to the device 'DEVICE GUID'.': SEHException - External component has thrown an exception.
Error : DEP6200 : Bootstrapping 'Device' failed. Device cannot be found. The data necessary to complete this operation is not yet available.
Unlike most, I am capable of deploying to an Emulator, just not the physical device. Based on this question: Error : DEP6200 : Bootstrapping 'Device' failed. Device cannot be found
I verified that Windows Phone 8.1 is installed, and ensured that the latest SDK is installed, so neither of those were solutions. I am able to deploy to physical hardware for desktop/tablet mode, but no go on the Lumia 635.
As it turns out, it was an issue with the installation of Windows 10 Mobile on my device. After a reset the deployment works great, and I have deployed dozens of apps to the device.