Some additional data--
Disabling XMP, updating BIOS to the latest beta version, shutting down all other vm's and changing the test vm to High latency sensitivity, pinned to a single ccx (4 cores) with full CPU reservation, and deleting all unused virtual devices on the VM did not fix (intermittent nvidia USB device freezing) problem.
No windows error messages when mouse freezes, device manager shows no errors.
No corresponding errors in VMware logs.
Still stumped.
