The Petya virus neutralized my entire country Ukraine - Analog Wanna Cry

Today I faced difficulties during the day. The post office and many supermarkets, banks and state organizations do not work. On TV, only about this and they say. On the streets of the grandmother near the entrance and those about the virus Petya pridymachut. Like connoisseurs are.
Even playing in the sandbox with the child - one boy of 5 years said that it's just Windows - shit, you need to install Linux.
And I thought about it. We have not fallen in Ukraine Privat Bank, one of the largest banks in Ukraine. And why? Yes, everything is simple - their entire system on Linux works. ATMs are on Windows, and so the common system is Linux.
Probably after such victories of mind over a thousand minds.
Microsoft shares should fall.

Wanna Cry= Petya. The coolest thing that this virus has infected all the PCs a couple of months ago. Just activation was today.
Interesting if the time on the server roll back and turn off the time synchronization with the Internet. Can I have time to put all the patches and go antivirus.?
And what do you think about this?
In my country there is a real crisis.
Ukraine is a strong country - Petya went out. :) :) :)