To make samples compile-able, after downloading DGK_Samples_7_5_CS.zip:

Option 1 (Easiest - before extracting):
  Right-click the .zip → Properties → Check "Unblock" → OK → Then extract

Option 2 (After extracting):
  Open PowerShell in the extracted folder and run:
  Get-ChildItem -Path ".\" -Recurse | Unblock-File