The global technology outage sparked by CrowdStrike’s faulty update will cost US Fortune 500 companies $5.4bn, insurers estimated, as the cybersecurity firm vowed to make changes to prevent it from happening again.The projected financial losses exclude Microsoft, the tech giant whose systems suffered widespread failures in the crash.Companies in banking and healthcare are expected to be hit the hardest, according to the insurer Parametrix, as well as major airlines. The total insured losses for ...