UPD: I rebooted the system and apparently it worked, I have not yet find and issue but any advice will still be seriously considered.
I have received a notification that update for my system is available, after reading the release news I decided to give it a try and after downloading all of the necessary files the window apparently freezed, I am afraid that if I restart the system I might not be able to see it in workable conditions, as the last processes that it is freezed on in my limited experience are responsible for system load. Please advice how to debug the system.
Screenshot of the issue:
