title: devcon.exe failed in windows 10
body: <p>I am manually trying to install a test driver from </p>
  
  <p><a href="https://github.com/Microsoft/Windows-driver-samples/tree/master/audio/sysvad" rel="nofollow noreferrer">https://github.com/Microsoft/Windows-driver-samples/tree/master/audio/sysvad</a></p>
  
  <p>I build sysvad solution and got tabletaudiosample on a windows 10 , 64 bit virtual machine.</p>
  
  <p>I copied .inf, .sys . cat and package files to a folder inside target computer.</p>
  
  <p><a href="https://i.stack.imgur.com/WBUKU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WBUKU.png" alt="enter image description here"></a></p>
  
  <p>1.Hardware ID will be found in respective inf file, open inf with notepad++ ,ctrl+f [HardwareIds]</p>
  
  <p>2.bcdedit /set TESTSIGNING ON</p>
  
  <p>reboot</p>
  
  <p>go to devcon.exe folder</p>
  
  <p>3.cd C:\Tools</p>
  
  <p>4.Install the certificate named as 'package', right click, install.</p>
  
  <p>5.open command prompt as administrator</p>
  
  <pre><code>devcon.exe install C:\Users\WDKRemoteUser\Desktop\Debug\tablet\tabletaudiosample.inf *ROOT\sysvad_TabletAudioSample
  
  Device node created. Install is complete when drivers are installed...
  Updating drivers for ROOT\sysvad_TabletAudioSample from C:\Users\WDKRemoteUser\Desktop\Debug\tablet\tabletaudiosample.inf.
  devcon.exe failed.
  </code></pre>
  
  <p>In the device manager, I can see an unknown device. Here devcon.exe failed with no other useful message.</p>
  
  <p>How can I see what are caused the failure? Is there any log file generated?</p>
  
  <p>Thanks for help.</p>