There are several options for developers who need to install and test their driver before it is signed for release by Microsoft: • Disable Kernel-Mode Checks: Microsoft provides detailed instructions for disabling signature checks on kernel-mode drivers during development and testing. • Test Signing: You can have Microsoft test-sign your driver package by checking Perform test-signing for Win10 and above or Perform test-signing for OS below Win10 (legacy) in the hardware submission wizard. The test-signed file does not require HLK testing by Microsoft, and may only be run on test machines. Please see Microsoft's hardware submission documentation for details on test signing. • Flight Signing: Flight-signed drivers are signed with a Microsoft Developer Test certificate that is trusted on "insider" builds of Windows 10 RS2 and above. You can flight sign your driver by checking Perform flight signing only during the hardware submission process. Please see Microsoft's hardware submission documentation for details on flight signing.