The glitch that caused outages for millions of users of Microsoft Windows devices last week continued to roil industries and snarl global air travel, as CrowdStrike warned about a malicious file sent by hackers posing as a "quick fix" to the problem.

The glitch that caused outages for millions of users of Microsoft Windows devices last week continued to roil industries and snarl global air travel, as CrowdStrike warned about a malicious file sent by hackers posing as a “quick fix” to the problem.