Many Webroot antivirus users experienced unsettling problems on Monday as false positives affected Windows Preview, Facebook, and more.
Social media sites ignited on late Monday afternoon with customers reporting that servers and computers alike stopped working as a result of the mishap.
A false positive quarantined "several hundred" files used by Windows Insider Preview. Hundreds of "line of business" apps, such as those that track patient appointments or manage office equipment, suffered the same fate.
Webroot even flagged Facebook as a phishing site!