This happened because a file that CrowdStrike pushed out, which by their own processes is not one that is signed, was immediately pushed out with one of their updates. This update was pushed directly through CrowdStrike’s own method, not via Windows Update. CrowdStrike maintains this capability in order to quickly respond to and prevent security threats. The fact that they have .sys files that aren’t signed is crazy on its own, and a huge screwup by CrowdStrike. So many companies relied upon and trusted this company because up until now, everybody considered it a great product, so it was extremely popular and prevalent. It’s been a huge wake up call for everybody in I.T.