Abstract: Solutions for responding to security-related incidents in a computer network, including a security server, and a client-side arrangement. The security server includes an event collection module communicatively coupled to the computer network, an event analysis module operatively coupled to the event collection module, and a solution module operatively coupled to the event analysis module. The event collection module is configured to obtain incident-related information that includes event-level information from at least one client computer of the plurality of client computers, the incident-related information being associated with at least a first incident which was detected by that at least one client computer and provided to the event collection module in response to that detection. The event analysis module is configured to reconstruct at least one chain of events causally related to the first incident and indicative of a root cause of the first incident based on the incident-related information.