CrowdStrike said that as of Thursday, more than 97 percent of the systems affected by the IT glitch were back online. Nearly a week ago, a global IT glitch took a toll on businesses, government entities and air travel around the world. CrowdStrike CEO George Kurtz said the company still has more work to do to repair the impact of last Friday's network outage. CrowdStrike said in an incident report earlier this week that a vulnerability in the company's quality control tool used to check for system update errors caused a critical flaw to be pushed to millions of machines running Windows. Approximately 8.50 million devices were affected by the outage, many of which were part of broader enterprise IT systems, meaning a wider range of impacts.