Ok let's place the 'if' game. - If Microsoft had coded its software properly there would be no need to patch vulnerabilites, - If the NSA had told Microsoft a

Ok let's place the 'if' game. - If Microsoft had coded its software properly there would be no need to patch vulnerabilites, - If the NSA had told Microsoft about the vulnerabilities when they were discovered instead of exploiting it (Assuming the NSA did not tell MS to not patch them on purpose), - If Microsoft did not have decades of being untrustworthy gathering the logical response of disabling auto-updates, - If Microsoft had not paid vendors to have windows pre-installed on new computers it would have the monopolistic position it has today, - if the NSA exploit and tools had not been made public, - and so on... All these are also valid ways that would have prevented wannacry spreading.