Identifying changes made to the system is the next step to troubleshoot why an application no longer launches, as recent changes often cause such issues. * Why Not A (Research the symptoms): Research is broader and should come after identifying changes. * Why Not C (Determine which steps need to be performed): This comes after identifying the issue. * Why Not D (Check the vendor's website): This is a later step if further guidance is needed. CompTIA A+ Exam Reference: Core 2 (220-1102), Section 3.1, troubleshooting methodology.