UPDATE 1/18: Today we have released Windows 10 Insider Preview Build 17074.1002 to Windows Insiders in the Fast ring. This build is the same as the version of Build 17074 released last week with 2 additional fixes. We have fixed the issue causing AMD PCs to become unbootable – which means we have removed the block for AMD PCs we put in place last week. And we also fixed the issue causing certain devices to hang on the boot screen after upgrading if virtualization is enabled in the BIOS.