Any flaw in the Windows XP system enough to destroy the world

It is known that Microsoft had suspended support security updates for the operating system Windows XP  since 2014, this system is one of the most successful operation of computing systems in the world enough that it was continuing its work for more than 13 years.

But in spite of that, the nuclear submarines, which carry with them the heads and Soaik atomic rely on the old system and Windows XP, which Microsoft released after four systems, what we can say in this case?

The number of nuclear countries in the world up to nine destructive power possessed by a full nuclear arsenal sufficient to destroy the world many times, with me not think that there is something strange in this story, especially since this power in the hands of an operating system is cracking and will not receive any updated anymore ?

As an example, the British Army has four nuclear submarines, each capable of carrying 16 tri-nuclear warheads each and every one of these headers possess destructive power is greater than the atomic bomb, which was launched on Hiroshima in World War II, eight times but in spite of that the defense minister is believed that British nuclear weapons and systems that operate the system and Windows XP safe
According to some sources