OK, I seem to have fixed my issue - and it's yet another different solution.

For me the problem was caused by the postgreSQL service causing issues which I picked up in Event Viewer. Since...

I have 'Most used' enabled, but no items on my list. I've hidden a few (but not all) and would actually like to bring back some that I've hidden.

Looked around the registry but couldn't find...

I've been having this problem for the last few days (windows 10 previously ran for several weeks without ever freezing).

I added a new 4k monitor and a new mouse - but the system still freezes...