Windows Defender Offline, a great tool to do an offline scan of your pc has been around for a while, enabling you to create a bootable usb-stick or ISO/CD has been integrated into the latest build of Windows 10 Insider 14271.
Opening Settings / Update & Security / Windows Defender you’ll notice the new option scrolling down to the bottom.
Pressing the ‘Scan Offline’ Button will immediately start a reboot of your device
Your system will reboot in a ‘mini’ version of Windows only showing the Windows Defender application to work with
Defender runs a ‘Quick Scan’ (scans memory & system locations) and returns to your operating system.
Cool new feature to do some quick troubleshooting!