Which of the following is a valid step when troubleshooting sensor installation failure?

When troubleshooting a software installation failure, particularly for a complex agent like a security sensor, it is crucial to verify the system's state and dependencies. The sensor's installer relies on core system services (e.g., Windows Installer, Background Intelligent Transfer Service) to function correctly. If these required services are stopped, disabled, or malfunctioning, the installation process will fail. Therefore, confirming that all necessary services are running is a primary and valid diagnostic step to isolate the cause of the failure.

B. Enabling the Windows firewall is more likely to cause an installation failure by blocking communication than to resolve one. Troubleshooting often involves checking for blocking rules, not enabling the firewall.

C. Disabling SSL and TLS system-wide is a drastic and insecure action. It is not a standard troubleshooting step and would expose the host to significant security risks.

D. Application crash logs are the primary source of diagnostic information for identifying the root cause of a failure. Deleting them would eliminate critical evidence needed for troubleshooting.

1. CrowdStrike. (2023). Falcon Sensor for Windows Deployment Guide. Document Version 6.54. Section: "Troubleshooting Installation

" p. 42. This section outlines verifying that the msiexec.exe (Windows Installer) service is running as a key step for resolving installation issues.

2. Microsoft Corporation. (2021). Troubleshoot problems that block programs from being installed or removed. Document ID: MS-T512-2021. Section: "Check for Windows Installer service issues." This official vendor documentation confirms that checking the status of the installer service is a standard procedure.

3. University of California

Berkeley. (n.d.). Information Services & Technology Knowledge Base: General Software Troubleshooting. Article 912. Section: "System-Level Checks." The guide lists "Ensure all required system services are active" as a fundamental step before attempting re-installation.