Satya Nadella has been the chief executive of Microsoft for more than five years but how many times has he uttered the word "ransomware" when waxing eloquent about the company he heads?

American software giant Microsoft has finally released its AccountGuard security service in Australia, at least six months after it was made available in 17 other countries.

Microsoft was targeted by eight of the top ten vulnerabilities in 2018, a study by the security intelligence firm Recorded Future has found.