New
#1
Seems you're correct...
March 15th 2017 Update KB3150513 for Windows 10 Version 1607This update doesn't contain binary code. It just contains new data for AppRaiser (Windows 10 Compatibility tool).
Apparently....
Perhaps it's in preparation for the Creators Update?This update provides the latest set of definitions for compatibility diagnostics that are performed on the system. The updated definitions will help enable Microsoft and its partners to ensure compatibility for all customers who want to install the latest Windows operating system. Installing this update also makes sure that the latest Windows operating system version is correctly offered through Windows Update, based on compatibility results....
This update will be offered only if the following prerequisite updates are installed:
- On Windows 10 Version 1607: the March 14, 2017, cumulative update (KB4013429)
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Did it freeze straight after this update or a while after?
See this thread for more info March 15th 2017 Update KB3150513 for Windows 10 Version 1607