My desktop finally came to a grinding halt with FH4 Hang type: Activation and plenty of other issues.
I did try resetting FH4, and reinstalling it, but no luck. Then after two days going trough all sorts of stuff, I decided that maybe Windows itself could do with reinstall. Windows were around 5 year old install being upgraded twice from 8.0 to 8.1 and now to 10, with also recent 2004 update, which made things even worse (not that were great before it, as some things just wouldn't install).
So backup all sorts of stuff, also time to do a bit of case cleaning with compressed air, disconnect other drives and do a nice clean install on SSD.
Two days and 250GB of DL later, again everything works fine.
Its a pain, as you have to redownload everything from the store and other stuff, but in the end I'm glad I did it, things run smoothly and as they should now.
Alfa Romeo - made in Italy, perfected in my garage