title: Windows 10 remote desktop RDP mstsc.exe won't start
body: <p>I have recently upgraded from win 8.1 to Win 10. Since the upgrade RDP wouldn't work correctly. </p>
  
  <p>I couldn't use a recently used connection. Instead I had to open a new window each time. Today it stopped working completely. </p>
  
  <p>If I tried to run mstsc.exe directly it would appear in task manager for less than a second before dissapearing.</p>
  
  <p>Edit: Issue was traced to "custom scale factors" in display settings. See answer below. </p>