The latest articles on Forem by Aung Ko Ko (@aungkoko). https://forem.com/aungkoko https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3712736%2F7d263484-426d-44a6-8aa9-6388d8b90f7a.jpg https://forem.com/aungkoko en Aung Ko Ko Thu, 15 Jan 2026 13:14:46 +0000 https://forem.com/aungkoko/diagnostics-101-the-art-of-systematic-troubleshooting-594e https://forem.com/aungkoko/diagnostics-101-the-art-of-systematic-troubleshooting-594e <p>A good troubleshooter is only as effective as the tools they use. Windows comes with powerful diagnostic utilities that most people overlook, and a few well‑chosen external tools can make the difference between guessing and knowing. In this post, I’ll walk through the essential toolkit for systematic diagnostics.</p> <p>🖥️ Built‑in Windows Tools</p> <ol> <li>Event Viewer</li> <li>Logs system and application events.</li> <li>Look for recurring warnings or errors around the time of a crash.</li> <li>Tip: Filter by “Critical” to spot serious issues quickly.</li> <li>Reliability Monitor</li> <li>Visual timeline of system stability.</li> <li>Shows when updates, drivers, or apps caused failures.</li> <li>Great for spotting patterns over weeks or months.</li> <li>Task Manager</li> <li>Real‑time view of CPU, memory, disk, and network usage.</li> <li>Identify resource hogs or runaway processes.</li> <li>Tip: Use the “Startup” tab to disable unnecessary boot programs.</li> <li>Resource Monitor</li> <li>More detailed than Task Manager.</li> <li>Breaks down disk and network activity per process.</li> <li>Perfect for tracking bottlenecks.</li> <li>Windows Memory Diagnostic</li> <li>Tests RAM for errors.</li> <li>Run when you suspect hardware instability.</li> </ol> <p>⚡ Command‑Line &amp; PowerShell</p> <ul> <li>sfc /scannow → Scans and repairs system files.</li> <li>DISM /Online /Cleanup-Image /RestoreHealth → Repairs Windows image corruption.</li> <li>Get-EventLog (PowerShell) → Pulls logs programmatically for deeper analysis. These commands are lifesavers when the GUI tools don’t reveal enough.</li> </ul> <p>🛠️ Trusted External Tools</p> <ul> <li>CrystalDiskInfo → Monitors hard drive health (SMART data).</li> <li>HWMonitor → Tracks temperatures and voltages.</li> <li>Process Explorer (Sysinternals) → Advanced process analysis beyond Task Manager.</li> <li>BlueScreenView → Decodes crash dump files for BSOD analysis.</li> </ul> <p>📒 How to Use Them Together</p> <ul> <li>Start with Event Viewer or Reliability Monitor to spot the timeline.</li> <li>Use Task Manager/Resource Monitor to check real‑time behavior.</li> <li>Run command‑line scans to repair system integrity.</li> <li>Confirm hardware health with external tools.</li> </ul> <p>🎯 Key Takeaway<br> Diagnostics isn’t about having one magic tool. It’s about knowing which tool to use at the right stage of investigation. Master these, and you’ll move from guessing to evidence‑based troubleshooting.</p> microsoft diagnostics troubleshooting