Why the new version of Adobe flash (20) collapse in my computer and all the webs are froozen to me?

It was suggested that Firefox 64bit version might alleviate this issue for you. That can be found here https://www.mozilla.org/en-US/firefox/beta/all/ . Install with all defaults.

Since you are on Windows 10 64 bit version you might want to take advantage of that.

The explanation as to why this is happening can be found in a post by jeromiec83223024 this thread here

and additional results here: Adobe 20 crashing on Firefox 43

You should not see two instances of flash player running out of process in task manager now.

Hope that helps

Best regards