Process Monitor is invaluable for investigating cases like that - at least one can look at what Windows is actually doing at that moment of freezing:

>Process Monitor is an advanced monitoring tool for Windows that shows real-time file system, Registry and process/thread activity. It combines the features of two legacy Sysinternals utilities, Filemon and Regmon ...

https://learn.microsoft.com/en-us/sysinternals/downloads/pro...