Diagnosing a corporate PC problem end to end
A layered method for domain PCs: device, network, name resolution, domain, identity, policy, resource, application. Find the failing layer with evidence, then fix only that.
- Level
- Advanced
- Length
- About 50 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Place a symptom in the right layer before acting
- Choose the quickest test that proves or rules out each layer
- Write an escalation with evidence when the fault is outside your scope
Course outline
- 1.Diagnosing a corporate PC problem end to endVideo · 5 min
- 2.Eight layers, one question at a timeLesson · 16 min
- 3.Scoping: who, where and since whenLesson · 12 min
- 4.Following the evidence chain to the first failureLesson · 13 min
- 5.Diagnosing a corporate PC problem end to end: knowledge checkKnowledge check · 14 questions
- 6.'The trust relationship failed' at sign-inScenario
- 7.Final exam6 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- CompTIA A+ troubleshooting methodology
- Microsoft Learn: Troubleshoot domain controller location issues
- Microsoft Learn: Troubleshoot Group Policy processing using event logs
See it with your own jobs and topics
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