No-one is being rude. People are answering your post to try and help, but have just not fully understood your problem.
Some of what you describe is the correct new windows behaviour that a lot of people thought was a bug when they first saw it. The detached menu bar is the new way and once you get used to it works OK.
But of course the o/s should not be crashing. Taskbar should still be perfectly useable. It seems like Cubase is crashing and taking down windows as soon as you try to open anything else…how about your windows start menu…does this also hang the o/s?
NB: the post that you link to has no relation to what you describe so is confusing things further.
This is about some minor gui corruption that only happens with non standard windows border settings.