UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2.
For more info, see Getting Started with UMDF.
When drivers create I/O queues, or configure default I/O queues, they can register the following interfaces so that the framework notifies the driver--by calling the methods associated with the interfaces--when events related to the interfaces occur. For more information about I/O queues and creating and configuring I/O queues, see Framework I/O Queue Object.