We have "downtime" systems in place, basically an isolated Epic cluster, to prevent situations like this. The problem is that this wasn't a software update that was downloaded by our computers, it was a configuration change by Crowdstrike that was immediately picked up by all computers running its agent. And, because hospitals are being heavily targeted by encryption attacks right now, it's installed on EVERY machine in the hospital, which brought down our Epic cluster and the disaster recovery cluster. A true single point of failure.