have a look at what processes are running & consuming resources in task manager next time it happens. from memory I think there's some kind of periodic job tha

have a look at what processes are running & consuming resources in task manager next time it happens. from memory I think there's some kind of periodic job that causes a lot of disk IO (some kind of defender antivirus scan? Indexing for search? I forget exactly what). Disable it or adjust schedule. Noticed similar thing when trying to play games in windows 10 VM, every now and again game would lag up horribly due to some scheduled task that runs by default.