First published on MSDN on Apr 17, 2014
When testing for certification, you’re required to use the latest service pack or update release 90 days after it’s made available publicly. This is to ensure maximum compatibility with your device driver and Windows.
Windows 8.1 Update will be required for all Windows 8.1 submissions starting on August 1, 2014.
Updated Mar 12, 2019
Version 2.0