Microsoft Windows gaff

Computers running Windows around the world were unable to run due to a broken change remotely installed in them.

With GNU/Linux, no one can forcibly install an "upgrade" (or a 'downgrade", as might prefer to call it). You decide when, and whether, to install changes, and whose changes to install.

Can anyone tell me what job this CrowdStrike software does? I have a hunch that this is one of the unjust consequences of the proprietary nature of Windows, but I don't actually know. It would be very useful to know for certain.