We have previously set up ELKStack and it has worked without error for several weeks but since yesterday we cannot start ElasticSearch. Logstash, Filebeat and Kibana works like they should.
But when we try to start ES we get an instant error saying "\Common was unexpected at this time." in the cmd prompt.
We have not made any conscious changes to any part of the configuration and we suspect a Windows update is to blame.
Could this be it and if so, what should we do to fix it?