 Good morning, I'm Rob Hugh-Jones at the BBC. Severe computer disruption has affected businesses and government services in much of the world. Airports, banks and hospitals are among those to suffer problems. A cyber security company, CrowdStrike, has issued a statement saying it's found a defect in a software update for users of Microsoft Windows. It said a fix had been deployed, but the BBC's Joe Tidy says that could take some time to implement.